Image forming method and element, in which the element contains a release layer and a photosensitive o-quinone diaziode layer

There is disclosed an image forming method which comprises forming an image portion by exposing and developing an image forming material having a light-sensitive composition, and transferring only the image portion onto an image receiving material with the non-image portion of the image receiving material being exposed, wherein the light-sensitive composition contains: PA0 (1) at least one selected from: PA1 (a) o-quinonediazide compounds; and PA1 (b) compositions containing both of a photoacid generating agent and a compound having at least one bond decomposable with the acid; and PA0 (2) a polymeric compound having a structure unit represented by the following formula in the molecular structure: EQU CH.sub.2 --CH(OCOR)-- PA0 wherein R represents an alkyl group having 1 to 17 carbon atoms.

BACKGROUND OF THE INVENTION 
This invention relates to an image forming method by use of an image 
forming material having a light-sensitive composition. The present 
invention can be utilized as, for example, the transfer image forming 
method of a color proof for color correction in color printing. 
A light-sensitive composition containing an o-quinonediazide compound or a 
light-sensitive composition containing a photoacid generating agent, a 
compound having at least one bond decomposable with acid has been used in 
the field of, for example, light-sensitive materials for printing. Prior 
to real printing in multicolor printing, a color sheet called color proof 
may be sometimes used, and for example, as the light-sensitive composition 
for constituting such color proof, this kind of light-sensitive 
composition may be used. 
The compound as described above is generally used together with a polymeric 
compound which can function as the binder. 
As the prior art of this kind, light-sensitive compositions having an 
o-quinonediazide compound and a novolak type phenol resin are disclosed in 
Japanese Unexamined Patent Publication (PCT) No. 5012/1981, Japanese 
Unexamined Patent Publications Nos. 97140/1984 and 41830/1972, and also 
examples of the light-sensitive compositions containing a photoacid 
generating agent, a compound having at least one bond decomposable with 
acid and a novolak type phenol resin are disclosed in Japanese Unexamined 
Patent Publications Nos. 247348/1987, 247349/1987 and 291634/1987. 
However, when a light-sensitive material is formed by use of such 
light-sensitive composition of the prior art, subjected to exposure and 
development to obtain an image and said image is transferred onto an image 
receiving material such as paper, heating at a high temperature is 
required for the transfer. For this reason, the image receiving material 
such as paper or the light-sensitive material itself may be sometimes 
expanded or deformed by heat, whereby dimensional slippage of the transfer 
image will be brought about. 
Such dimensional slippage is a crucial problem when the light-sensitive 
material used as, for example, the color proof for correction as described 
above. This is because dimensional slippage between multicolor images may 
be sometime brought about. 
Also, the above-mentioned light-sensitive composition by use of a novolak 
type phenol resin of the prior art has a problem of inferior discoloration 
resistance. 
Further, an image forming material using copolymer resin of vinyl 
acetate/crotonic acid as a binder is also disclosed in Japanese Unexamined 
Patent Publications Nos. 2040/1988 and 298337/1988. But they all relate to 
an image forming method transferring colored image to the image receiving 
paper together with release layer, consequently problems such that an 
non-image portion is glossy and has a different appearance in its quality 
from that of acutual printed matter are involved therein. 
An object of the present invention is to solve the problems of the prior 
art as mentioned above and provide an image forming method which obtains a 
transferred image with a light-sensitive material by transferring only 
image by use of a light-sensitive composition, which requires no high 
temperature heating for transfer even when applied to a transfer type 
light-sensitive material and therefore is free from dimensional slippage, 
etc. 
Also, another object of the present invention is to provide an image 
forming method as mentioned above by use of a light-sensitive composition 
with good discoloration resistance. 
SUMMARY OF THE INVENTION 
The above object of the present invention can be accomplished by an image 
forming method which comprises forming an image portion by exposing and 
developing an image forming material having a light-sensitive composition, 
and transferring only said image portion onto an image receiving material 
with the non-image portion of the image receiving material being exposed, 
wherein said light-sensitive composition contains: 
(1) at least one selected from: 
(a) o-quinonediazide compounds; and 
(b) compositions containing both of a photoacid generating agent and a 
compound having at least one bond decomposable with the acid; and 
(2) a polymeric compound having a carboxylic acid vinyl ester polymer unit 
represented by the following formula in the molecular structure: 
EQU RCOOCH=CH2 
wherein R represents an alkyl group having 1 to 17 carbon atoms. 
DESCRIPTION OF THE PREFERRED EMBODIMENTS 
In the present invention, the content of the o-quinonediazide compound in 
the light-sensitive composition should be preferably 5 to 50 % by weight, 
more preferably 10 to 30 % by weight in the total solids. 
In the present invention, the content of the photoacid generating agent in 
the light-sensitive composition should be preferably 0.1 to 10 % by 
weight, more preferably 0.2 to 5 % by weight, in the total solids in the 
light-sensitive composition. The content of the acid decomposed compound 
should be preferably 5 to 70 % by weight, more preferably 10 to 50 % by 
weight, on the same basis. The polymeric compound should be preferably 30 
to 95 % by weight, more preferably 50 to 90 % by weight, on the same 
basis. 
The present invention is described below in more detail. 
The light-sensitive composition of the present invention contains at least 
one of (a) an o-quinonediazide compound and (b) a composition containing 
both of a photoacid generating agent and an acid decomposable compound. 
As the o-quinonediazide compound to be used in the present invention, any 
of those which can function as the light-sensitive agent can be used. 
Specifically, for example, the compounds obtained by condensation of 
1,2-benzoquinonediazide-4-sulfonyl chloride, 
1,2-naphthoquinonediazide-4-sulfonyl chloride, 
1,2-naphthoquinonediazide-5-sulfonyl chloride, 
1,2-naphthouinonediazide-6-sulfonyl chloride with hydroxyl group and/or 
amino group containing compounds may be preferably used. 
As the hydroxyl group-containing compound, there may be included, for 
example, trihydroxybenzophenone, dihydroxyanthraquinone, bisphenol A, 
phenol novolak resin, resorcin benzaldehyde condensed resin, pyrogallol 
acetone condensed resin, etc. As the amino group containing compound, for 
example, there are aniline, p-aminodiphenylamine, p-aminobenzophenone, 
4,4'-diaminodiphenylamine, 4,4'-diaminobenzophenone, etc. 
Including those described here, concerning quinonediazide compounds, 
reference can be further made to "Light Sensitive System" (John Wily & 
Sons, New York, published in 1965) written by J. Kosar, and 
"Light-sensitive Polymers" written by Nagamatsu and Inui (Kodansha, 
published in 1977). 
The photoacid generating agent to be used in the present invention means a 
compound which can generate an acid by irradiation of active ray. As such 
photoacid generating agent, many known compounds such as diazonium salts, 
phosphonium salts, sulfonium salts, and iodonium salts of BF.sub.4 -, 
PF.sub.8 -, SbF.sub.8 -, SiFe.sub.8.sup.2 -, ClO.sub.4 -, organic halogen 
compounds, o-quinone-diazidesulfonyl chloride, etc. can be used and also 
organometallic/organic halide compounds can be used as the active ray 
sensitive component which forms or separates an acid during irradiation of 
active ray. 
In principle, all organic halide compounds known as free radical forming 
light-sensitive initiators can be used as the photoacid generating agent 
which can form hydrohalogenic acid. Examples of such compounds are 
disclosed in.U.S. Pat. Nos. 3,515,552, 3,536,489, 3,779,778, and West 
German Unexamined Publication No. 2,243,621. 
Also, compounds generating acid by photolysis are disclosed, for example, 
in West German Unexamined Publication No. 2,610,842, Japanese Unexamined 
Patent Publication Nos. 74728/1979, 77742/1980, 16323/1982 and 3626/1985. 
The specific examples are described as follows. 
##STR1## 
Further, o-naphthoquinonediazide-4-sulfonic halogenide disclosed in 
Japanese Unexamined Patent Publication No. 6209/1975 can be also used. 
Next, the light-sensitive composition of the present invention contains an 
acid decomposable compound together with the above-mentioned photoacid 
generating agent. As the compound having a bond decomposable with an acid 
by receiving the acid generated by such photoacid generating agent (acid 
decomposable compound), there may be included, for example, a compound 
having 
##STR2## 
bond, or a compound having 
##STR3## 
bond. 
Examples of specific compound having --C--O--C-- bond may include compounds 
having acetal or ketal group, compounds having ortho-carboxylic acid ester 
group and/or carboxylic acid amideacetanol group as disclosed in Japanese 
Unexamined Patent Publication No. 120714/1976, polymers having acetal or 
ketal group in the main chain as disclosed in Japanese Unexamined Patent 
Publication No. 13342/1978, compound having enol ether group as disclosed 
in Japanese Unexamined Patent Publication No. 12995/1980, compounds having 
N-acylimino carbonic acid salt group as disclosed in Japanese Unexamined 
Patent Publication No. 126236/1980, or polymers having ortho-carboxylic 
acid ester group in the main chain as disclosed in Japanese Unexamined 
Patent Publication No. 17345/1981. 
Examples of specific compounds having 
##STR4## 
bond may include compounds as disclosed in Japanese Unexamined Patent 
Publication No. 37549/1985, 52845/1985 or 5 121446/1985. 
Examples of specific compounds having ester group may include compounds as 
disclosed in Japanese Unexamined Patent Publication No. 3625/1985 or 
10247/1985. 
Among these compound having bond decomposable with acid, compounds having 
##STR5## 
bond are preferred. Above all, compounds having at least one 
##STR6## 
bond and also at least one hydrophilic group as disclosed in Japanese 
Unexamined Patent Publication No. 121446/1985 are particularly preferred. 
Specific examples of the compound having bond decomposable with acid are as 
follows. 
##STR7## 
TABLE 
__________________________________________________________________________ 
Photosen- Cross 
Photo- 
sitive 
Curcumin 
sec- 
sensi- 
m-cresol: 
compound 
ester tional 
tivity, 
p-cresol 
(parts by 
(% by pro- 
m sec- 
ratio weight) 
weight) 
file 
onds 
__________________________________________________________________________ 
Example 
8 40:60 V (15) 
I (3) 
a 200 
VII 
(15) 
9 20:80 V (10) 
II (3) 
a 250 
VII 
(20) 
10 35:65 V (10) 
III 
(3) 
a 220 
VII 
(20) 
11 15:85 V (10) 
IV (3) 
a 270 
VII 
(20) 
12 43:57 V (10) 
IV (1.5) 
b 180 
VII 
(20) 
13 40:60 VI (10) 
I (3) 
b 150 
VII 
(20) 
14 60:40 V (10) 
I (3) 
b 150 
VII 
(20) 
15 40:60 V (20) 
I (3) 
a 550 
VII 
(10) 
16 47:53 V (10) 
I (3) 
b 280 
VII 
(20) 
17 40:60 V (5) 
I (17) 
b 400 
VII 
(10) 
Comparative 
3 40:60 -- IV (30) 
c 800 
Example 
4 40:60 V (2) 
IV (30) 
c 900 
VII 
(4) 
__________________________________________________________________________ 
These compounds decomposable with acid may be used alone as one kind or as 
a mixture of two or more kinds. 
Also, as acid decomposable compound compounds having at least one 
ortho-carbonic acid ester group represented by the following formula 
[X]can be preferably used: 
##STR8## 
Examples of such compound having at least one ortho-carbonic acid ester 
group (hereinafter called ortho-carbonic acid ester compound) may include, 
for example, compounds which can be synthesized by subjecting at least one 
of compounds having at least one phenolic OH group and/or at least 
alcoholic OH group (hereinafter called OH group containing compound) and a 
tetraalkoxymethane to interesterification reaction of one step or two or 
more steps. 
For such interesterification reaction, the same method as described in 
Svensk Kem. Tidskr. 65, 10 (1953),etc., or similar method can be used. 
As the above-mentioned OH group containing compound, for example, 
monohydric alcohols, dihydric alcohols, trihydric alcohols, 4 or more 
hydric alcohols, monohydric phenolic compounds, dihydric phenolic 
compounds, trihydric phenolic compounds, 4 or more hydric phenolic 
compounds, or compounds having at the same time phenolic OH group and 
alcoholic OH group, etc. can be included. 
Examples of the above-mentioned monohydric alcohol may include aliphatic 
alcohols such as n-propyl alcohol, n-butyl alcohol, n-pentyl alcohol, 
n-hexyl alcohol, n-heptyl alcohol, n-octyl alcohol, n-decyl alcohol, 
n-dodecyl 
alcohol, n-tetradecyl alcohol, n-hexadecyl alcohol, n-octadecyl alcohol, 
isopropyl alcohol, isobutyl alcohol, sec-butyl alcohol, tert-butyl 
alcohol, isopentyl alcohol, active amyl alcohol, tert-pentyl alcohol, 
cyclopentanol, cyclohexanol, allyl alcohol, crotyl alcohol, methyl vinyl 
carbinol, ethylene glycol monomethyl ether, ethylene glycol monoethyl 
ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl 
ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl 
ether, etc., aromatic alcohols such as benzyl alcohol, .alpha.-phenylethyl 
alcohol, .beta.-phenylethyl alcohol, diphenyl carbinol, triphenyl 
carbinol, cinnamyl alcohol, etc. 
Examples of dihydric alcohols may include those disclosed in Japanese 
Unexamined Patent Publication No. 133429/1978, namely aliphatic alcohols 
such as pentane-1,5-diol, n-hexane-1,6-diol, 2-ethyl-hexane-1,6-diol, 
2,3-dimethyl-hexane-1,6-diol, heptane-1,7-diol, cyclohexane-1,4-diol, 
nonane-1,7-diol, nonane-1,9-diol, 3,6-dimethyl-nonane-1,9-diol, 
decane-1,10-diol, dodecane-1,12-diol, 1,4-bis-(hydroxymethyl)-cyclohexane, 
2-ethyl-1,4-bis-(hydroxymethyl)-cyclohexane, 
2-methyl-cyclohexane-1,4-diethanol, 2-methyl-cyclohexane-1,4-dipropanol, 
thiodipropylene glycol, 3-methyl-pentane-1,5-diol, dibutylene glycol, 
oxypivalic acid-neopentyl glycol ester, 
4,8-bis-(hydroxymethyl)-tricyclodecane, n-butene-(2)-1,4-diol, 
n-but-2-yne-1,4-diol, n-hex-3-yne-2,5-diol, 
1,4-bis-(2-hydroxyethoxy)-butyne-(2), p-xylylene glycol, 
2,5-dimethyl-hex-3yne2,5-diol, bis-(2-hydroxyethyl)-sulfide, 
2,2,4,4-tetra-methylcyclobutane-1,3-diol, di-, tri-, tetra-, penta- and 
hexaethylene glycol, di- and tripropylene glycol and polyethylene glycols 
with average molecular weights of 200, 300, 400 and 600, etc., aromatic 
alcohols such as p-xylylene glycol, 2-methyl-2-phenyl-1,3-propane diol, 
etc. 
Examples of trihydric alcohols may include those disclosed in Japanese 
Unexamined Patent Publication No. 17345/1981, namely aliphatic or aromatic 
alcohols such as glycerol, butane-1,2,4-triol, 
2-hydroxymethyl-butane-1,4-diol, pentane-1,2,5-triol, 
2-hydroxymethyl-pentane-1,5-diol, hexane-1,2,5-triol, 
2-hydroxymethyl-hexane-1,6-diol, hexane-1,2,6-triol, 
4-ethyl-hexane-1,4,5-triol, heptane-1,4,5-triol, 
1-(1,2-dihydroxyethyl)-4-hydroxy-methylbenzene, 
2,4,6-triethyl-5-propyl-heptane-1,3,7-triol, 
1-(2,3-dihydroxy-propoxy)-4-hydroxymethyl-benzene, 
1-(2,3-dihydroxypropyl)-4-hydroxymethyl-benzene, octe-3-nyne-1,7,8-triol, 
octane-1,2,8-triol, octane-1,3,8-triol, nonane-1,4,5-triol, 
3-(1-hydroxy-1-methyl-ethyl)-5-oxaoctane-2,8-diol, 
2,6,8-trimethyl-3-hydroxymethyl-nonane-6,7-diol, 6,7-diol, 
2-hydroxymethyl-3-oxa-heptane-1,7-diol and hexadecane-1,2,16-triol, etc. 
As 4 or more hydric alcohols, for example, aliphatic alcohols such as 
pentaerythritol, threitol, pentitol, sorbitol, polyvinyl alcohol, etc. may 
be included. Also, aromatic alcohols may be available. 
As monohydric phenolic compounds, for example, phenol, o-cresol, m-cresol, 
p-cresol, 3,5-xylenol, carvacrol, thymol, .alpha.-naphthol, 
.beta.-naphthol, etc. may be included. 
Dihydric phenolic compounds may include catechol, resorcin, hydroquinone, 
2,2-bis(4-hydroxyphenyl)butane, bis(p-hydroxyphenyl)methane, 
2,2-bis(4-hydroxyphenyl)-propyne, 2,3-dihydroxynaphthalene, 
1,6-dihydroxy-naphthalene, 2,6-dihydroxynaphthalene, etc. 
As trihydric phenolic compounds, pyrogallol, phloroglucin, etc. may be 
included. 
As 4 or more hydric phenolic compounds, 1,4,9,10-tetrahydroxyanthracene, 
etc. may be included. 
As the compound having at the same time phenolic OH and alcoholi OH, 
2-(bis(4-hydroxyphenyl)methyl)benzyl alcohol, etc. may be included. 
As the above-mentioned tetraalkoxymethane, for example, tetramethoxymethane 
or tetraethoxymethane, etc. may be generally employed 
Tetraethoxymethane can be synthesized from, for example, chloropicrine and 
sodium ethoxide according to the method as described in Organic Synthesis 
Coll. Vol. IV, 457 (1963). Other tetraalkoxymethanes can be also 
synthesized according to similar methods. Also, they can be synthesized 
according to a method similar to that as described in J. Org. Chem., 36, 
1176 (1971) or a method similar to that as described in J. Org. Chem., 37, 
4198 (1972). 
The above-mentioned ortho-carbonic acid ester compound can be obtained by, 
for example, reacting the above tetraalkoxymethane with the above OH group 
containing compound without use of a solvent at a temperature of 
60.degree. to 170.degree. C., preferably 80.degree. to 150.degree. C. The 
liberated lower alcohol may be evaporated in some cases. At this time, it 
is preferable to carry out the reaction in the presence of an acidic 
catalyst such as p-toluenesulfonic acid or sulfuric acid, etc. In some 
cases, the reaction may be also carried out under reduced pressure. Also, 
an inert solvent under the above reaction conditions, for example, 
benzene, toluene, xylene, dioxane, chlorinated hydrocarbons, etc. can be 
also used as the reaction solvent. The liberated lower alcohol may be 
evaporated together with a part of the solvent in some cases. 
The quantitative ratio in the reaction between the above-mentioned 
tetraalkoxymethane and the above-mentioned OH group containing compound 
may be generally made 4 moles of OH groups as the total per one mole of 
tetraalkoxymethane, but in some cases, other quantitative ratios from this 
may be available. 
When two kinds of OH group containing compounds are used, the total three 
of tetraalkoxymethane and two kinds of 0H group containing compounds may 
be subjected to the reaction at the same time, or in some cases, first the 
reaction of tetraalkoxymethane with one of the OH group containing 
compounds may be carried out, followed by the reaction of the product with 
the other OH group containing compound. When employing 3 or more kinds of 
OH group containing compounds, the reaction can be similarly carried out. 
Also, synthesis is possible according to the same method as described in 
Chem. Ber. 544 (1961) or similarl method. For example, there may be 
employed the method in which 
##STR9## 
diphenyloxydichloromethane and the above-mentioned OH group containing 
compound are subjected to the reaction. 
The product obtained by the above method is an orthocarbonic acid ester 
compound, and as an example of this, a compound containing one, two or 
more of ortho-carbonic acid ester group unit shown below or a mixture of 
them may be included. 
##STR10## 
R.sub.1, R.sub.2, R.sub.3 and R.sub.4 in the above formulae each represent 
an alkyl, aryl, aralkyl or alkenyl group, etc. These alkyl, aryl, aralkyl, 
alkenyl groups having substituents are also included. Also, of R.sub.1 
-R.sub.4, at least two may be mutually bonded to form a ring. 
Also, the portion of the bonding arm may be further bonded to one having 
the same one as described above or another ortho-carbonic acid ester group 
unit through substituted or unsubstituted alkylene, arylene, aralkylene, 
alkenyl group, etc. 
Also, the above-mentioned compound having at least one ortho-carbonic acid 
ester group unit may be suitably 1 to 50 of ortho-carbonic acid ester 
group units in the molecule. 
In the following, specific examples of the compounds having at least one 
ortho-carbonic acid ester group are shown. 
Exemplary compounds. 
__________________________________________________________________________ 
No. 1 
The reaction product between (CH.sub.3 O).sub.4 C and 
HO(CH.sub.2 CH.sub.2 O).sub.3 H 
No. 2 
The reaction product between (CH.sub.3 O).sub.4 C and 
HO(CH.sub.2 CH.sub.2 O).sub.4 H 
No. 3 
The reaction product between (CH.sub.3 O).sub.4 C and 
HOCH.sub.2 CH(OH)C.sub.3 H.sub.6 CH.sub.2 OH 
No. 4 
The reaction product between (C.sub.2 H.sub.5 O).sub.4 C and 
HO(CH.sub.2 CH.sub.2 O).sub.2 H 
No. 5 
The reaction product between (CH.sub.3 O).sub.4 C and 
(HOCH.sub.2).sub.4 C 
No. 6 
The reaction product between (C.sub.2 H.sub.5 O).sub.4 C and 
HOCH.sub.2 CH(OH)CH(OH)CH.sub.2 OH 
No. 7 
The reaction product between (C.sub.4 H.sub.9 O).sub.3 C(OCH.sub.3) 
and 
##STR11## 
No. 8 
The reaction product between (CH.sub.3 O).sub.4 C and 
##STR12## 
No. 9 
(n-C.sub.4 H.sub.9 OCH.sub.2 CH.sub.2 O).sub.4 C 
No. 10 
##STR13## 
No. 11 
##STR14## 
No. 12 
The reaction product between (C.sub.2 H.sub.5 O).sub.4 C and 
##STR15## 
No. 13 
The reaction product between (CH.sub.3 O).sub.4 C and 
HO(CH.sub.2 CH.sub.2 O) .sub.3H and HO(CH.sub.2 CH.sub.2 O) .sub.4H 
No. 14 
The reaction product between (n-C.sub.4 H.sub.9 O).sub.4 C and 
HO( CH.sub.2 CH.sub.2 O) .sub.4H, HOCH.sub.2 CH(OH)C.sub.3 H.sub.6 
CH.sub.2 OH 
No. 15 
The reaction product between (CH.sub.3 O).sub.4 C and 
HO(CH.sub.2 CH.sub.2 O) .sub.2H, (HOCH.sub.2)C 
No. 16 
The reaction product between (CH.sub.3 O).sub.4 C and 
##STR16## 
No. 17 
The reaction product between (CH.sub.3 O).sub.4 C and 
HOCH.sub.2 CH.sub.2 OH, HO(CH.sub.2 CH.sub.2 O) .sub.3H 
No. 18 
The reaction product between 
##STR17## 
No. 19 
The reaction product between 
##STR18## 
No. 20 
The reaction product between (C.sub.2 H.sub.5 O).sub.4 C and 
##STR19## 
No. 21 
The reaction product between (CH.sub.3 O).sub.4 C and 
##STR20## 
No. 22 
The reaction product between 
##STR21## 
No. 23 
The reaction production between 
##STR22## 
No. 24 
##STR23## 
##STR24## 
__________________________________________________________________________ 
Next, the light-sensitive composition in the method of the present 
invention contains a polymeric compound having the carboxylic acid vinyl 
ester polymer unit represented by the following formula in the molecular 
structure: 
EQU RCOOH.dbd.CH.sub.2 
(wherein R represents an alkyl group having 1 to 17 carbon atoms). 
Any of polymeric compounds having the structure as mentioned above can be 
used, but as the carboxylic acid vinyl ester monomer for constituting the 
polymer unit represented by the above formula, those as exemplified below 
are preferred. The names and the chemical formulae are listed together. 
______________________________________ 
(1) vinyl acetate CH.sub.3 COOCHCH.sub.2 
(2) vinyl propionate 
CH.sub.3 CH.sub.3 COOCHCH.sub.2 
(3) vinyl butyrate 
CH.sub.3 (CH.sub.2).sub.2 COOCHCH.sub.2 
(4) vinyl pivalate 
(CH.sub.3).sub.3 CCOOCHCH.sub.2 
(5) vinyl caproate 
CH.sub.3 (CH.sub.2).sub.4 COOCHCH.sub.2 
(6) vinyl caprylate 
CH.sub.3 (CH.sub.2).sub.6 COOCHCH.sub.2 
(7) vinyl caprate CH.sub.3 (CH.sub.2).sub.8 COOCHCH.sub.2 
(8) vinyl laurate CH.sub.3 (CH.sub.2).sub.10 COOCHCH.sub.2 
(9) vinyl myristate 
CH.sub.3 (CH.sub.2).sub.12 COOCHCH.sub.2 
(10) vinyl palmitate 
CH.sub.3 (CH.sub.2).sub.14 COOCHCH.sub.2 
(11) vinyl stearate 
CH.sub.3 (CH.sub.2).sub.16 COOCHCH.sub.2 
(12) vinyl versatate 
##STR25## 
______________________________________ 
The above-mentioned R is also inclusive of alkyl group having substituents, 
that is, vinyl esters of substituted carboxylic acids are also included 
within the polymer unit. 
The polymeric compound in the present invention may be a polymer having one 
kind of the above carboxylic acid vinyl esters polymerized, or a polymer 
having two or more of carboxylic acid vinyl esters copolymerized, and it 
may be also a copolymer of a carboxylic acid vinyl ester with another 
monomer copolymerizable therewith at any desired component ratio. 
Examples of monomer units which can be used in combination with the polymer 
unit represented by the above formula may include: 
ethylenic unsaturated olefins such as ethylene, propylene, isobutylene, 
butadiene, isoprene, and the like; 
styrenes such as styrene, .alpha.-methylstyrene, p-methylstyrene, 
p-chlorostyrene, and the like; 
acrylic acids such as acrylic acid, methacrylic acid, and the like; 
unsaturated aliphatic dicarboxylic acids such as itaconic acid, maleic 
acid, maleic anhydride, and the like; 
diesters of unsaturated dicarboxylic acids such as diethyl maleate, dibutyl 
maleate, di-2-ethylhexyl maleate, dibutyl fumarate, di-2-ethylhexyl 
fumarate, and the like; 
.alpha.-methylene aliphatic monocarboxylic acid esters such as methyl 
acrylte, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, dodecyl 
acrylate, 2-chloroethyl acrylate, phenyl acrylate, methyl 
.alpha.-chloroacrylate, methyl methacrylate, ethyl methacrylate, and the 
like; 
nitriles such as acrylonitrile, methacrylonitrile, and the like; 
amides such as acrylamide, and the like; 
anilides such as acrylanilide, p-chloroacrylanilide, m-nitroacrylanilide, 
m-methoxyacrylanilide, and the like; 
vinyl monomers, for example, 
vinyl ethers such as methyl vinyl ether, ethyl vinyl ether, isobutyl vinyl 
ether, .beta.-chloroethyl vinyl ether, and the like; 
vinyl chloride, vinylidene chloride, vinylidene cyanide; 
ethylene derivatives such as 1-methyl-1-methoxyethylene, 
1,1-dimethoxyethylene, 1,2-dimethoxyethylene, 
1,1-dimethoxycarbonylethylene, 1-methyl-1-nitroethylene, and the like; 
N-vinyl compounds such as N-vinylpyrrole, N-vinylcarbozole, N-vinylindole, 
N-vinylpyrrolidene, N-vinylpyrrolidone, and the like. These monomers of 
the vinyl type, etc. exist in the polymeric compound with the structure of 
the unsaturated double bond being cleaved. 
Of the polymeric compounds to be used in the present invention, 
particularly preferable are those having vinyl acetate polymer units in 
the molecular structure. Among them, those having 40 to 95 % by weight of 
vinyl acetate polymer units, number average molecular weight (MN) of 1,000 
to 1000,000 and weight average molecular weight of 5,000 to 5000,000 are 
preferred. 
More preferably, a polymeric compound having vinyl acetate polymer unit 
(particularly containing 40 to 95 % by weight of this unit) and carboxylic 
acid vinyl ester polymer unit with longer chain than vinyl acetate, 
(preferably with 4 to 17 carbon atoms, particularly vinyl versatate 
polymer unit, particularly containing 10 to 50 % by weight of this unit), 
may be employed, particularly those having number average molecular weight 
(MN) of 2,000 to 60,000 and weight average molecular weight (MW) of 10,000 
to 150,000. 
In this case, the monomer constituting the polymeric compound having vinyl 
acetate polymer unit to be copolymerized with vinyl acetate may be any 
desired one, provided that it can form a copolymer, and can be selected as 
desired from, for example, the monomers as exemplified above. 
In the following, the copolymers which can be used as the polymeric 
compound in the present invention are enumerated by showing the monomeric 
components. As a matter of course, the following examples are not 
limitative of the present invention. 
(1) vinyl acetate-ethylene 
(2) vinyl acetate-styrene 
(3) vinyl acetate-crotonic acid 
(4) vinyl acetate-maleic acid 
(5) vinyl acetate-2-ethylhexyl acrylate 
(6) vinyl acetate-2-ethylhexyl maleate 
(7) vinyl acetate-methyl vinyl ether 
(8) vinyl acetate-vinyl chloride 
(9) vinyl acetate-N-vinylpyrrolidone 
(10) vinyl acetate-vinyl propionate 
(11) vinyl acetate-vinyl pivalate 
(12) vinyl acetate-vinyl versatate 
(13) vinyl acetate-vinyl laurate 
(14) vinyl acetate-vinyl stearate 
(15) vinyl acetate-vinyl versatate-ethylene 
(16) vinyl acetate-vinyl versatate-2-ethylhexyl acrylate 
(17) vinyl acetate-vinyl versatate-vinyl laurate 
(18) vinyl acetate-vinyl versatate-crotonic acid 
(19) vinyl propionate-vinyl versatate 
(20) vinyl propionate-vinyl versatate-crotonic acid 
(21) pivalic acid-vinyl stearate-maleic acid. 
The light-sensitive composition to be used in the method of the present 
invention can constitute an image forming material by use thereof. For 
example, it can be made a color image forming material in the case of 
being used as color proof, etc. 
The colored light-sensitive layer of the colored image forming material in 
this case is removed imagewise by the development subsequent to imagewise 
exposure to form a colored image. 
In the colored light-sensitive layer, dyes, pigments are added as the 
colorant. Particularly, when used for color correction, pigments, dyes 
with tones coincident with normal colors demanded there, namely yellow, 
magenta, cyan, black are required, or otherwise metal powder, white 
pigment, fluorescent pigment, etc. may be also used. When the present 
invention is applied to color proof, a large number of pigments and dyes 
known in this field of art as shown below can be used. 
(C.I. means color index) 
Victoria Pure Blue (C.I. 42595) 
Auramine (C.I. 41000) 
Katiron Brilliant Flavin (C.I. Basic 13) 
Rhodamine 6GCP (C.I. 45160) 
Rhodamine B (C.I. 45170) 
Safranine OK 70:100 (C.I. 50240) 
Eliograucine X (C.I. 42080) 
Fast Black HB (C.I. 26150) 
No. 1201 Lionol Yellow (C.I. 21090) 
Lionol Yellow GRO (C.I. 21090) 
Symlar Fast Yellow 8GF (C.I. 21105) 
Benzidine Yellow 4T-564D (C.I. 21095) 
Symlar Fast Red 4015 (C.I. 12355) 
Lionol Red 7B4401 (C.I. 15830) 
Fastgen Blue TGR-L (C.I. 74160) 
Lionol Blue SM (C.I. 26150) 
Mitsubishi Carbon Black MA-100 
Mitsubishi Carbon Black #30, #40, #50 
______________________________________ 
Lionol Blue FG7391G 
Lionol Blue FG7393G 
Lionol Blue 700-10FG 
Lionol Yellow SGR-H 
Lionol Yellow FGN-H 
Cyanine Blue KRG 
Cyanine Blue 4012 
Cyanine Blue RS-30 
Phthalocyanine Blue 4933GNEP 
Lionol Blue FG7330 
Seika Fast Carmine 1478 
Lionol Red 6BFG-4219X 
No. 1206 Lionol Yellow 
______________________________________ 
In the present invention, it is necessary that no pigment components of the 
colored light-sensitive layer remain in the non-image portion after 
developing colored light-sensitive sensitive layer in view of finishing 
quality. Among the pigments as described above, it is preferably to use a 
pigment having an insoluble salt such as sulfonic acid, carbonic acid, 
amine, etc. Such pigments may be obtained by converting a soluble group of 
water-soluble dyes to an insoluble salt, or processed pigments treated by 
treating agents such as lecithin, naphthenic acid metallic salt, 
alkylbenzene sulfonate, dialkylnaphthalene sulfonate, mono- or 
di-alkylnaphthalene sulfonate, mono- or di-alkylsulfosuccinate, 
dialkylphosphate, rhodinate, or organic amine, etc. 
When a colorant is used in the present invention, the ratio of 
colorant/binder in the colored light-sensitive layer can be determined by 
those skilled in the art according to the known method in view of the 
aimed optical density and the eliminability of the colored light-sensitive 
layer relative to the developer. For example, in the case of a dye, 
preferably its content may be 5 % to 75 % by weight, while in the case of 
a pigment, preferably its content may be suitably 5 % to 90 % by weight. 
Also, the film thickness of the colored light-sensitive layer can be 
determined by those skilled in the art from the aimed optical density, the 
kind of the colorant to be used in the colored light-sensitive layer (dye, 
pigment, carbon black) and its content, but the resolving power becomes 
higher and the image quality is better as the film thickness of the 
colored light-sensitive layer is as thin as possible within the tolerable 
range. Therefore, said film thickness is generally used preferably within 
the range of 0.1 g/m.sup.2 to 5 g/m.sup.2. 
In practicing the present invention, in the light-sensitive composition, 
further plasticities, coatablity enhancers, etc. can be also added, if 
necessary. 
As the plasticizer, there may be included various low molecular compounds 
such as phthalates, triphenylphosphates, maleates, and as the coatability 
enhancer, surfactants such as fluorine type surfactants, nonionic 
surfactants as represented by ethyl cellulose polyalkylene ether, etc. 
When an image forming material, particularly a colored image forming 
material is formed by use of the light-sensitive composition to be used in 
the method of the present invention, the colored light-sensitive layer can 
be also divided into two layers of a colored layer comprising a colorant 
and a binder and a light-sensitive layer comprising a light-sensitive 
composition. In this case, either layer may be arranged on the support 
side. 
When an image forming material is constituted by use of the light-sensitive 
composition to be used in the method of the present invention, any desired 
support may be used, but a transparent support may be preferably used. As 
the transparent support, polyester film, particularly biaxial stretched 
polyethylene terephthalate film is preferred with respect to dimensional 
stability to water, heat. Otherwise, acetate film, polyvinyl chloride 
film, polyethylene film, polypropylene film, polyethylene film, etc. can 
be used. 
The image forming material thus obtained can be used in the form of 
transferring an image onto an image receiving material. For effecting 
transfer onto the image receiving material and facilitating peel-off of 
the support after image transfer, namely enhancing releasability between 
the support and the image forming layer, a release treatment can be 
applied on the support surface, or a release layer can be provided on the 
support surface. These are described hereinbelow. 
In the image forming method of the present invention, the image forming 
material is generally developed after imagewise exposure through a color 
separation mask, etc. to form an image. At this time, only the image 
portion is directly transferred and laminated onto an image receiving 
material from the image obtained on the support. That is, only the colored 
image layer forming substantially the image is transferred and laminated. 
In this case, for effecting transfer onto the image receiving surface and 
facilitating peeling of the support after image transfer, it is preferable 
to apply a release treatment on the support surface with an appropriate 
oil repellant substance or provide a release layer on the support. 
As such oil repellant substance, for example, silicone resins, fluorine 
resins, fluorine type surfactants, polyolefins, polyamides, etc. can be 
used, and as the release layer, for example, there can be used alcohol 
soluble polyamide, alcohol soluble nylon, blend of partially esterified 
resin of copolymer of styrene and maleic anhydride with methoxymethylated 
nylon, polyvinyl acetate, polyacrylate, copolymer of polymethyl 
methacrylate and acrylate, polyvnyl chloride, copolymer of vinyl chloride 
and vinyl acetate, polyvinyl butyrate, cellulose acetate phthalate, methyl 
cellulose, ethyl cellulose, cellulose diacetate, cellulose triacetate, 
polyvinyl alcohol, butyl cellulose, hydroxyethyl cellulose, carboxymethyl 
cellulose, cyanoethyl cellulose, cellulose acetate, cellulose triacetate, 
cellulose acetate butyrate, hydroxypropylmethyl cellulose phthalate, 
hydroxypropylmethyl cellulose hexahydrophthalate, or mixtures of these. 
The thickness of the release layer may be preferably within the range of 
0.01 .mu.m to 100 .mu.m, particularly preferably 0.1 .mu.m to 50 .mu.m. 
For enhancing releasability, as a particularly preferred embodiment, there 
may be included an example as a polypropylene layer or a polyethylene 
layer thinner than the thickness of the support is prepared. 
As a preferable example of the polyethylene layer to be used in the present 
invention there may be included ethylene-vinyl acetate copolymer resin, 
those having a vinyl acetate ratio within said copolymer resin within the 
range of 5 % to 33 % are preferable, and the VICAT softening point of said 
resin should be preferably 80.degree. C. or lower. Also, in the 
ethylene-vinyl acetate copolymer of the present invention, various 
polymers, super-cooling substances, surfactants, release agents, etc. can 
be added within the range such that the softening point may not exceed 
80.degree. C. 
As the method for providing a polypropylene layer or a polyethylene layer 
on the support, there may be included the following methods etc., namely: 
(1) the so called dry lamination method, in which a solution of polyvinyl 
acetate, polyvinyl chloride, epoxy resin, polyurethane type resin, natural 
rubber, synthetic rubber, etc., dissolved in an organic solvent is used as 
the adhesive, these adhesives are applied on a support, dried in hot air 
or by heating, and then a polypropylene film or a polyethylene film is 
superposed thereon, followed by lamination by pressure contact under 
heating; 
(2) the so called hot melt lamination method in which a copolymer of 
ethylene and vinyl acetate, a copolymer of ethylene and an acrylic acid 
ester, a polyamide resin, a petroleum resin, rosins, waxes or a mixture of 
these is used as the adhesive, these adhesives are applied on a support 
while maintaining the molten state by heating them as such by the doctor 
blade method, the roll coating method, the gravure method, the reverse 
roll method, etc., and then immediately a polypropylene film or a 
polyethylene film is plastered thereon, followed by, if necessary, heating 
to a high temperature and then cooling, to effect lamination; 
(3) the so called extrusion lamination method, in which polypropylene or 
polyethylene is maintained under the molten state, extruded into a film 
through an extruder, and laminated by pressure contact of a support while 
this is still under the molten state; 
(4) the so called co-extrusion method, in which during molding of a film 
which becomes a support by the melt extrusion method, by use of a 
plurality of extruders are employed, and the film is extruded at one time 
together with polypropylene or polyethylene, thereby forming a 
polypropylene layer or a polyethylene film on the support film. 
In the image forming method of the present invention, the developer to be 
used for developing the image forming material may be any desired one, 
provided that it has the developing action capable of developing the 
material to be processed. Preferably, a developer containing an alkali 
agent and an anionic surfactant may be used. 
Available alkali agents may include: 
(1) inorganic alkali agents such as sodium silicate, potassium silicate, 
potassium hydroxide, sodium hyroxide, lithium hydroxide, secondary or 
tertiary sodium phosphate or ammonium salt, sodium metasilicate, sodium 
carbonate, ammonia, etc.; 
(2) organic amine compounds such as mono-, di- or trimethylamine, mono- di- 
or triethylamine, mono- or diisopropylamine, n-butylamine, mono-, di- or 
triethanolamine, mono-, di- or triisopropanol amine, ethyleneimine, 
ethylenediimine, etc. 
Available anionic surfactants may include: 
(1) higher alcohol sulfuric acid esters (e.g. sodium salt of lauryl alcohol 
sulfate, ammonium salt of octyl alcohol sulfate, ammonium salt of lauryl 
alcohol sulfate, secondary sodium alkyl sulfate, etc.); 
(2) aliphatic alcohol phosphoric acid esters (e.g. sodium salt of cetyl 
alcohol phosphate, etc.); 
(3) alkylaryl sulfonic acid salts (e.g. sodium dodecylbenzene sulfonate, 
sodium isopropylnaphthalene sulfonate, sodium dinaphthalene sulfonate, 
sodium metanitrobenzene sulfonate, etc.); 
(4) alkylamide sulfonic acid salts 
##STR26## 
(5) sulfonic acid salts of dibasic aliphatic esters (e.g. sodium dioctyl 
sulfosuccinate, sodium dihexyl sulfosuccinate, etc.); 
(6) formaldehyde condensates of alkylnaphthalene sulfonic acid salts (e.g. 
formaldehyde condensate of sodium dibutylnaphthalene sulfonate, etc.). 
The alkali agent and the anionic surfactant can be used in any desired 
combination.

EXAMPLES 
The present invention is described below by referring to Examples and 
Comparative examples. 
As a matter of course, the present invention is not limited only to 
Examples described below, but can take various embodiments. 
EXAMPLE 1 
On the polypropylene surface of a support having a polypropylene film with 
a thickness of 25 .mu.m laminated on a polyethylene terephthalate film 
with a thickness of 50 .mu.m by the dry lamination method, a colored 
light-sensitive composition dispersing solution having the following 
composition was applied by use of a wire bar to a dry film thickness of 1 
.mu.m, followed by drying, to prepare a colored image forming material of 
four colors. 
______________________________________ 
t-Butylphenol-naphthoquinone-1,2- 
0.616 g 
diazide-4-sulfonic acid ester 
Binder polymer shown below 
4.384 g 
Pigment shown below amount shown below 
Ethyl cellosolve 39.6 g 
Fluorine type surfactant 
0.25 g 
(FC-430 manufactured by 3M) 
______________________________________ 
Binder polymer (Polymeric compound according to the present invention) 
Vinyl acetate-vinyl versatate (80:20 parts by weight) copolymer 
MN=22,000 
MW=60,000 
Pigments 
______________________________________ 
Black: Carbon Black MA-100 
0.99 g 
(manufactured by Mitsubishi Kasei) 
Cyan: Cyanine blue 4920 
0.55 g 
(manufactured by Dainichi Seika) 
Magenta: Seika Fast Carmine 1483 
0.68 g 
(manufactured by Dainichi Seika) 
Yellow: Seika Fast Yellow H-7055 
0.68 g 
(manufactured Dainichi Seika) 
______________________________________ 
On the polyethylene terephthalate surface of the colored image forming 
material of four colors obtained as described above, the color separation 
dot positive films of the respective colors were superposed on one 
another, imagewise exposure was effected by a 4 KW metal halide lamp from 
a distance of 50 cm for 20 seconds, followed by development by dipping in 
the following developer for 30 seconds, to form a colored image of four 
colors. 
Developer 
______________________________________ 
Na.sub.2 CO.sub.3 15 g 
Surfactant (Pelex NBL, manufactured by 
50 g 
Kao-Atlas) 
Distilled water 1000 g 
______________________________________ 
Next, the image surface of the black color image was brought into close 
contact with an art paper, passed through a pair of heated nip rolls under 
a pressurization condition of 5 kg/cm2 at a speed of 50 cm/min., and the 
support was peeled off. Peeling could be done easily, whereby only the 
black color image portion was transferred onto the art paper. 
Subsequently, colored images were transferred in the order of cyan, 
magenta, yellow, whereby a color proofing image comprising four colors was 
obtained on the art paper. The transfer temperatures, the dimensional 
slippages between the four colors and the discoloration degrees with lapse 
of time of the images are shown in Table 1. In this Example, since only 
the image portion was transferred, finishing was very approximate to 
actual printed matter. 
EXAMPLE 2 
Colored image of four colors were formed in entirely the same manner as in 
Example 1 except for changing the colored light-sensitive composition 
dispersing solution to that shown below: 
______________________________________ 
2-Trichloromethyl-5-[.beta.-2-benzofuryl) 
0.145 g 
vinyl]-1,3,4-oxadiazole 
Exemplary compound No. (19) of the 
0.732 g 
compounds containing ortho-carbonate 
group shown above 
Binder polymer 4.384 g 
(the same as used in Example 1) 
Pigment (the same as used in Example 1) 
amount shown below 
Ethyl cellosolve 39.6 g 
Fluorine type surfactant 
0.25 g 
(FC-430, manufactured by 3M) 
______________________________________ 
and transferred, whereby a color proofing image comprising four colors was 
obtained on an art paper. The transfer temperatures, dimensional slippages 
between the four colors, and the discoloration degree with lapse of the 
image are shown in Table 1. In this Example, since only the image portion 
was transferred, finishing was found to be very approximate to actual 
printed matter. 
EXAMPLE 3 
On the ethylene-vinyl acetate copolymer resin layer surface of a support 
having an ethylene-vinyl acetate copolymer resin layer (EVAFLEX P-1405 
manufactured by Mitsui-Du Pont Chemical, vinyl acetate content: 14 % by 
weight, VICATE softening point 68.degree. C.) with a thickness of 25 .mu.m 
laminated by the extrusion lamination method on a polyethylene 
terephthalate film with a thickness of 75 .mu.m, which has been coated 
with poly urethan type adhesive layer with a thickness of 0.2 .mu.m, a 
colored light-sensitive composition dispersing solution having the 
following composition was applied by use of a wire bar to a dry film 
thickness of 1.5 .mu.m, followed by drying, to prepare a colored image 
forming material of four colors. 
______________________________________ 
Ester compound of p-cresol novolak resin with 
0.616 g 
naphthoquinone-1,2-diazide-4- 
sulfonic acid chloride 
Vinyl acetate-vinyl versatate copolymer 
8.768 g 
(80:20 wt. %, weight average molecular 
weight 50,000, 50% methanolic solution) 
Pigment shown below 
Cyclohexanone 35.2 g 
Fluorine type surfactant 0.01 g 
(FC-430, manufactured by 3M) 
______________________________________ 
Pigments 
______________________________________ 
Black: Carbon Black MA-100 
0.99 g 
(manufactured by Mitsubishi Kasei) 
Cyan: Lionol Blue-7730 
0.55 g 
(manufactured by Toyo Ink Co.) 
Magenta: Seika Fast Carmine 1483 
0.68 g 
(manufactured by Dainichi Seika) 
Yellow: No. 1206 Lionol Yellow 
0.68 g 
(manufactured by Toyo Ink Co.) 
______________________________________ 
On the polyethylene terephthalate surface of the colored image forming 
material of four colors obtained as described above, the color separation 
dot positive films of the respective colors were superposed on one 
another, imagewise exposure was effected by a 4 KW metal halide lamp from 
a distance of 50 cm for 20 seconds, followed by development by dipping in 
the following developer at 30.degree. C. for 30 seconds, to form a colored 
image of four colors. 
Developer 
______________________________________ 
Konica PS plate developer SDR-1 
20 ml 
(manufactured by Konica) 
Pelex NBL ( manufactured by 
50 ml 
Kao-Atlas) 
Distilled water 400 ml 
______________________________________ 
Next, the image surface of the black color image was brought into close 
contact with an art paper, passed through a pair of nip rolls heated to 
90.degree. C. under a pressurization condition of 5 kg/cm.sup.2 at a speed 
of 50 cm/min., and the support was peeled off. Peeling could be done 
easily at the interface between the ethylene-vinyl acetate copolymer resin 
layer and the colored image, whereby the black color image was transferred 
onto the art paper. Subsequently, colored images were transferred in the 
order of cyan, magenta, yellow, whereby a color proofing image comprising 
four colors was obtained on the art paper. 0n the art paper, only the 
colored image portion was transferred, namely the paper surface of the 
non-image portion was exposed, and the color proofing image obtained 
resembled extremely closely the image quality of the printed matter 
prepared by conventional off-set printing. 
EXAMPLE 4 
On the ethylene-vinyl acetate copolymer resin layer surface of a support 
having an ethylene-vinyl acetate copolymer resin layer (EVAFLEX P-1007 
manufactured by Mitsui-DuPont Chemical, vinyl acetate content: 10% by 
weight, VICAT softening point 72.degree. C.) with a thickness of 25 .mu.m 
laminated by the extrusion lamination method on a polyethylene 
terephthalate film with a thickness of 75 .mu.m which has been coated with 
poly urethan type adhesive layer with a thickness of 0.2 .mu.m, a colored 
light-sensitive composition dispersing solution having the following 
composition was applied by use of a wire bar to a dry film thickness of 
1.5 .mu.m, followed by drying, to prepare a colored image forming material 
of four colors. 
______________________________________ 
Ester compound of p-cresol novolak resin with 
0.616 g 
naphthoquinone-1,2-diazide-4- 
sulfonic acid chloride 
Vinyl acetate-vinyl stearate-2-ethylhexylacrylate 
8.768 g 
copolymer 
(70:20:10 wt. %, weight average molecular 
weight: 70,000, 50% methanolic solution) 
Pigment shown below 
Cyclohexanone 35.2 g 
Fluorine type surfactant 0.01 g 
(FC-430, manufactured by 3M) 
______________________________________ 
Pigments 
______________________________________ 
Black: Carbon Black MA-100 
0.99 g 
(manufactured by Mitsubishi Kasei) 
Cyan: Cyanine blue 4933GNEP 
0.55 g 
(manufactured by Dainichi Seika) 
Magenta: Seika Fast Carmine 1483 
0.68 g 
(manufactured by Dainichi Seika) 
Yellow: Lionol Yellow-SGR-H 
0.68 g 
(manufactured Toyo Ink Co.) 
______________________________________ 
Subsequently, exposure, developing and image transfer processings were 
conducted in the same manner as in Example 3, to obtain a color proofing 
image comprising four colors on an art paper. On the art paper, only the 
colored image portion was transferred, namely the paper surface of the 
non-image portion was exposed, and the color proofing image obtained 
resembled extremely closely the image quality of the printed matter 
prepared by conventional off-set printing. 
COMATIVE EXAMPLE 1 
Example 1 was repeated except that the novolak resin shown below was used 
as the binder polymer and SDR-1 (Konica PS plate developer; manufactured 
by Konica K.K.) as the developer in the above Example 1. 
The data are shown similarly as in Example described above in Table 1. 
Binder polymer (novolak resin) 
PR-50716 manufactured by Sumitomo Dures K.K. (novolak type 
phenol-formaldehyde resin) 
The measurement results of the transfer temperatures, the dimensional 
slippages in the X-direction and the Y-direction, the coloration degrees 
with lapse of time of the colored light-sensitive binders concerning 
respective examples and comparative examples as described above are shown 
below in Table 1. 
In Table 1, the dimensional slippage is shown in terms of the slippage 
(.mu.m) in each direction between the register marks at the four corners 
of the image in the passing direction during transfer (defined as 
X-direction) and the width direction during transfer (defined as 
Y-direction). The register marks are arranged with distances of 400 mm in 
the X-direction and 600 mm in the Y-direction. 
The coloration degree with lapse of time is a value of the binder 
coloration degree (brown coloration degree) of the transferred image onto 
a paper measured as the yellow reflection density. For measurement, a 
Macbeth reflection densitometer RD-918 was used. One which becomes greater 
in coloration degree with lapse of time is greater in discoloration to be 
poor in discoloration resistance. When the coloration degree becomes 
greater, particularly the colors of the transferred image of cyan, magenta 
and yellow become turbid, whereby image reproducibility is deteriorated. 
TABLE 1 
__________________________________________________________________________ 
Coloration degree with lapse 
Transfer 
Dimensional slippage 
of time of the colored light- 
temperature 
(.mu.m) sensitive layer 
No. (.degree.C.) 
X-direction 
Y-direction 
0 3 days 
7 days 
__________________________________________________________________________ 
Example 1 
80 30 50 0.02 
0.02 0.02 
Example 2 
70 20 40 0.02 
0.02 0.02 
Example 3 
70 20 30 0.02 
0.02 0.02 
Example 4 
70 10 20 0.02 
0.02 0.02 
Comparative 
120 200 300 0.02 
0.08 0.17 
example 1 
__________________________________________________________________________ 
As can be understood from Table 1, for Examples 1-4 of the present 
invention, good transfer can be accomplished even when the transfer 
temperature may be made relatively lower, and also dimensional slippage is 
small. In contrast, for Comparative example 1, considerably high 
temperatures are required for all concerning the transfer temperature, and 
dimensional slippages are by far greater as compared with Examples. 
Also, referring to the coloration degree with lapse of time of the binder 
in the colored light-sensitive layer, for Examples 1-4 of the present 
invention, no coloration degree change can be seen, while in Comparative 
example 1, coloration degree is considerably changed, whereby it can be 
understood that considerable discoloration has occurred. 
From Table I, it can be understood that dimensional slippage is small, and 
the coloration degree change with lapse of time of the colored 
light-sensitive layer binder is small in Examples of the present 
invention. 
As described above, according to the present invention, there can be 
provided a light-sensitive composition and an image-forming method which 
requires no high temperature when made into the transfer type, can prevent 
dimensional slippage, and also is good in discoloration resistance.