Year: 1888

page_text: Date of Application, 6th Feb., 1888
Complete Specification Left, 6th Nov., 1888
Complete Specification Accepted, 31st Dec, 1888
I, JEAN BAPTISTE GERMEUIL BONNAUD of 39 Stroud Green Road, Finsbury Park,
in the County of Middlesex, Chemist, do hereby declare the nature of this invention
to be as follows :-
The object of this invention is to produce plain or colored pictures and designs on
china, earthenware and glass at a considerably less cost than painting by hand as at
present.
According to this invention 1 take a sheet of glass, and after having thoroughly
cleaned the same I coat it with a solution composed of about 100 cubic centimetres of
water, to which I add about 20 grammes of treacle or other like substance and from
about 5 to 20 grammes of Bichromate of Potash and about 10 grammes of Borate of
Soda. The glass (thus prepared) after having been left to dry is placed on a positive
photographic print, engraving or other suitable picture or design, which it is desired
to reproduce and after having exposed the same to the action of the light for a length
of time (usually from a quarter to half an hour with a good light) the luminous rays
will have acted on the prepared glass so as to allow of the development (by degrees)
of the picture by dusting on powdered metallic colors as follows. I commence by
dusting on the colored powder to represent the general shade of the design or picture
to be produced and then I proceed in the same manner with all the necessary tones
of color, this done I fix the colors by means of a fixing solution such as lithographic
varnish and leave this to dry thoroughly and I then complete my picture by adding
the light tones by dusting on the colors and when dry, I pour collodion over the
whole in order to transfer (as hereinafter described) the design or picture on to the
china or other vitrified surface either under or over the enamel by employing suitable
colors for the purpose as in ordinary painting on china. The picture thus possessing
a provisional support, I put the whole in a bath of tepid water where I leave it until
the organic matter is entirely dissolved, after which I plunge it in a bath containing

page_text: about 10 per cent. of caustic potash, then wash it in clean water and place it in another
bath of water containing 10 per cent. of borax and 5 per cent. of sugar, when the
collodion film with picture ou it will leave the glass and I am thus enabled to transfer
it to the china or other like material as desired and when this is baked in the ordinary
way an absolutely permanent design or picture either plain or colored is produced
according to the powder that has been dusted on as aforesaid.
Dated this Sixth day of February 1888.
Improvements in the Production of Pictures and Designs on China,
Earthenware, and Glass.
I, JEAN BAPTISTE GERMEUIL BONNAUD of 39 Stroud Green Road, Finsbury Park
in the County of Middlesex Chemist, 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 this invention is to produce plain or colored pictures and designs on
china, carthenware and glass at a considerably less cost than painting by hand as at
present. According to this invention 1 take a sheet of glass and after having
thoroughly cleaned the same I, for the purpose of sensitizing it, coat it with a
solution of organic matter, that which I prefer is composed of about 100 cubic
centimetres of water, to which I add about 20 grammes of treacle or other like
substance and from about 5 to 20 grammes of bichromate of potash (according to the
state of the atmosphere) and about 10 grammes of borate of soda. The glass (thus
prepared) after having been left to dry is placed on a positive photographic print,
engraving, or other suitable picture or design (rendered transparent by suitable means
such as waxing for example unless such photographic print or other picture or design
is on glass which I prefer) which it is desired to reproduce, with the sensitized
surface next the print, and after having exposed the same to the action of the light
according to the usual manner of printing from a negative for a sufficient length of
time (sufficient for the light to traverse the whole of the picture) the luminous rays
will have acted on the sensitized glass so as to allow of the development in the succeed-
ing process (by degrees) of the picture by dusting on powdered metallic colors as
follows.
1 commence by dusting on the colored powder to represent the general shado of
the design or picture to be produced and then I proceed in the same manner with all

page_text: the necessary tones of color, this done I fix the colors by means of a fatty composition
thus placing these colors in the same condition as those which are put on by hand in
the ordinary way.
This composition consists of —
Fatty Essence of Venice
Powdered Resin
"
"
10 grammes
5 grammes
This picture which by the ordinary processes would be lost after half an hour may
be kept by this treatment for a day or two before completing. After complete
dessication this composition presents a slightly tacky coating which retains the
powdered colors or to print my picture entirely I dust on with a dusting.brush the
large surfaces and I complete the small surfaces and the details with a small paint
brush in flat tints using with the colors the above named fatty solution.
This
finished, it is evident that on turning it over a fine painting with all the light and.
shade, in fact with all the tones is entirely completed and ready to be transferred on
to the porcelain or other similar material to be decorated at one operation. The
transfer from the provisional support can be effected a few minutes after the coloring
whether such coloring has been effected by dusting only or by dusting and painting
combined.
In order to effect this transfer I coat the picture with a fatty composition of
collodion so that no cracking may take place by the dessication, the following is the
composition I employ :-
Lowdered resin -
granimes
The picture, thus possessing a provisional support, I put in a bath of tepid water
where I leave it until the organic matter is entirely dissolved after which I plunge it
in a bath containing about 10 per cent. of caustic potash then wash it in clean water
and place it in another bath of water containing 10 per cent. of borax and 5 per cent.
of sugar when the collodion film with the complote picture on it will leave the glass
and I am thus enabled to transfer it to the china or other like material as desired, .
which china or other material has been previously placed in the bath ready to receive
the film when it has left the glass, and when this is fired in the ordinary way an
absolutely permanent design or picture colored or toned as aforesaid is produced.
I thus obtain a picture with all the colors which will melt in the one firing and
give a very fine picture.
I would remark in conclusion that I am the inventor of a previous process for
which Letters Patent were granted on my behalf to Emile Andreoli dated the
30th day of August 1880 and numbered 3,511 for "An improved process for
ornamenting fictile wares, glass, and metallic surfaces," consisting of two distinct
operations viz., one for the colors and another for the impression of the shades of these
colors. This process gave very beautiful results in some cases but was defective in
as much as it was found to be impracticable especially with complicated subjects on
account of being obliged to transfer a photograph on to a painted "silhouette" and
this mode of proceeding necessitated much work as the "silhouette" painted on the
object to be decorated had to be mathematically correct and correctly registered on
to the picture which was impossible on curved surfaces, moreover the second coat of
color only covered the first coat already fired and consequently they would not mix in
the second firing but by my present invention I dispense entirely with the use of a
"silhouette" process and thereby avoid the difficulties of register and the single firing
makes a complete union of the colors.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1st. The process of producing on a provisional support a complete picture or design
_in_colors or tones with all the light and shade so that the same may be transferred to
the china or other like material at one operation substantially as herein described.
2nd. In combination with this process the employment of fatty bodies throughout
substantially as herein described.
3rd. The process of producing pictures and designs in colors or tones on china,
earthenware, and glass substantially as herein described.
DL
1
1000
BROWNE & Co.,
Agents for the Applicant.