Improvements in Chemical Compositions for Preparing the Surface: of Suitable Material for Photographic Prints.
Year: 1896

page_text: Date of Application, 17th July, 1896
Complete Specification Left, 7th Jan., 1897-Accepted, 20th Feb., 1897
PROVISIONAL SPECIFICATION..
Improvements in Chemical Compositions for Preparing the Surface:
of Suitable Material for Photographic Prints.
We, EMIL PAUL SCHOENFELDER and! EMIL KEHLE, both of 27 South Orange
Avenue, in the City of Newark, County of Essex and State of New Jersey, U.S.A.,
Chemists, do hereby declare the nature of this invention to be as follows:-
The object of our invention is to provide a chemical compound or composition
for the preparation of paper, especially glazed paper, porcelain or any other
suitable material, on which photographic prints are to be made from a negative
plate, whereby the toning of the picture is accomplished simultaneously with the
printing, and thus the subjecting of the print, after it is made, to a separate toning
bath is fully avoided, and whereby the color of the picture will appear a bluish-
white.
Our composition consists of the following ingredients combined in the proportions.
stated, and which will call stock or ground solution, viz. :-.
:
STOCK SOLUTION A:
Collodion.
300 grains of pyrozyline..
1 lb. of ether.
1 lb. of alcohol absolute.
STOCK SOLUTION B.
15 grains of a chloride of a metal of the platina class, such as chloride of gold,
of iridium, of rhodium, of osmium, of palladium, or of platinum; said 15 grains
of chloride being dissolved in 14 ounces of alcohol (40%):-
From the stock solution A, 1 ounces is thoroughly mixed with 10 drops of
stock solution B and the following ingredients are added in the proportions
stated, viz. :-
(a) 3 grains of an organic acid, such as citric acid, (tartaric acid, formic acid, etc.),
which is dissolved before: mixing with the other ingredients, in 3 drops of alcohol.
(b) 15 grains of nitrate of silver or its equivalent, first dissolved in 50 drops of
40% alcohol.
(c) 1 grains of a chloride-such as chloride of strontium, or of barium, or of
zirconia-dissolved before mixing with the other ingredients in 3 drops of 40%
alcohol.
(d) 2 drops of a softening chemical, such as glycerine or castor oil.
(e) 5 to 50 drops of ammonia (according to its strength), and
(f) 2 to 5 drops of bromide of gold.
The above emulsion is applied to the surface of the material on which the
picture or photo is to be printed.
The surface must be thoroughly dried before using.
After the print has been made, it is given a bath in a solution of hypo-sulphate
of soda-one-part to 15 parts of water, in which bath it remains, until all superfluous

page_text: chemicals bave been removed from the picture, (about 5 minutes), when it is taken
out and thoroughly washed in clean water.
The picture is then ready for mounting and does not require any additional
toning (as the toning has been accomplished simultaneously with the printing-
and it has a superior finish, of a bluish-white color, that will not fade or turn
yellow by being exposed to light.
By adding ammonia to the emulsion the time of exposure is greatly reduced,
and by the bromide of gold, the tone or color of the picture is given a bluish-
white appearance.
In place of stock solution A, a solution can be used, composed of gelatine one-
part and water three-parts, in which case the ingredients mentioned under a, b.-
and c, are dissolved in water instead of alcohol.
Dated this 17th day of July 1896.
J. P. BAYLY,
18 Fulham Place, Paddington, London, W., Agent for the Applicants.
Improvements in Chemical Compositions for Preparing the Surface
of Suitable Material for Photographic Prints.
We, EMIL PAUL SCHOENFELDER, and EMIL KEHLE, both of 27 South
Orange Avenue, in the City of Newark, County of Essex, and State of New
Jersey, U.S.A., Chemists, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The object of our invention is to provide a chemical compound or composition
for the preparation of paper; especially glazed paper, porcelain, or any other
suitable material on which photographic prints are to be made from a negative
plate, whereby the toning of the picture is accomplished simultaneously with the
printing, and thus the subjecting of the print, after it is made, to a separate
toning-bath is fully avoided, and whereby a slight bluish tone is imparted to the
picture.
Our composition consists of the following ingredients combined in the proportions
stated, and which we will call "stock" or "ground" solution, viz. :
Collodion:
Pyroxylin
Ether-
Absolute alcohol
three hundred grains;
3
one pound;
one pound.
STOCK SOLUTION B.
Fifteen grains of a chloride of a metal of the platinum class, such as gold,
iridium, rhodium osmium, palladium, or platinum chlorid, said filteen grains of 4
chlorid being dissolved in one and one-half ounces of alcohol (forty per cent.).
One and one-half ounces of stock solution A is thoroughly mixed with ten drops
of stock solution B, and the following ingredients are added in the proportions
stated, viz.:
(a) Three grains of an organic acid, such as citric, tartaric, or formic acid, &c., 4
which is dissolved before mixing with the other ingredients in three drops of
alcohol
.
Fifteen grains of a chloride of a metal of the platinum class, such as gold,
iridium, rhodium osmium, palladium, or platinum chlorid, said filteen grains of 4
chlorid being dissolved in one and one-half ounces of alcohol (forty per cent.).
One and one-half ounces of stock solution A is thoroughly mixed with ten drops
of stock solution B, and the following ingredients are added in the proportions
stated, viz.:
(a) Three grains of an organic acid, such as citric, tartaric, or formic acid, &c., 4
which is dissolved before mixing with the other ingredients in three drops of
alcohol

page_text: (b) Fifteen grains of silver nitrate or its equivalent, first dissolved in fifty drops
of forty per cent. alcohol;
(c) One and one-half grains of a chlorid-such as strontium, barium, or zirconium
chlorid-dissolved before mixing with the other ingredients in three drops of
forty er cent. alcohol;
(d) Two drops of a softening chemical, such as glycerin or castor-oil;
(e) Five to fifty drops of ammonia, (according to its strength,) and
(1) Two to five drops of gold bromide.
The above emulsion is applied to the surface of the material on which the
picture or photograph is to be printed.
The surface must be thoroughly dried before using.
After the print has been made it is given a bath in a solution of sodium
hyposulphite, one part to fifteen parts of water, in which bath it remains until all
superfluous chemicals have been removed from the picture (about five minutes),.
when it is taken out and thoroughly washed in clean water. The picture is then
ready for mounting and does not require any additional toning, (as the toning has.
been accomplished simultaneously with the printing,) and it has a superior finish of
a slight bluish tone that will not fade or turn yellow by being exposed to light.
By adding ammonia to the emulsion the time of exposure is greatly reduced, and
by the gold bromide the tone of the picture is given a slight bluish appearance.
In place of stock solution A a solution can be used composed of gelatin one part
and water three parts, in which case the ingredients mentioned under a, b and c are
dissolved in water instead of alcohol.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim, is.
1. A chemical composition to be used for preparing the surface of suitable
material for photographic purposes, consisting of a chloride of a metal of the
platinum class, silver nitrate, a holding substance, an organic acid, such as citric
acid, and ammonia, substantially as described.
2. A chemical composition to be used for preparing the surface of suitable
material for photographic prints, consisting of a salt of a metal of the platinum.
class, silver nitrate, a holding substance, such as collodion, an organic acid, such as
citric acid, glycerin, and ammonia, substantially as described.
3. A chemical composition to be used for preparing the surface of suitable-
material for photographic prints, consisting of a holding substance, such as.
collodion, a salt of a metal of the platinum class, silver nitrate, a chlorid, such as
strontium chlorid, a softening ingredient, such as glycerin, an organic acid, such
as citric acid, and ammonia, substantially as described.
4. A chemical composition to be used for preparing the surface of suitable.
material for photographic prints, consisting of a salt of a metal of the platinum
class, silver nitrate, a holding substance, such as collodion, an organic acid, such as
citric acid, glycerin, ammonia, and gold bromid, substantially as described.
5. A chemical composition to be used for preparing the surface of suitable.
material for photographic prints, consisting of a holding substance, such as
collodion, a salt of metal of the platinum class, silver nitrate, a chloride, such
as strontium chloride, a softening ingredient, such as glycerin, an organic acid,
such as citric acid, ammonia, and gold bromid, substantially as described.
Dated this 7th day of January 1897
J. P. BAYLY,
18 Fulham Place, London, W., Agent for the Applicants.