Improvement in Processes of Coloring Enameled Photographs. Page: 1 of 1
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UNITED STATES PATENT OFFICE,
WILLIAM W. WILLIAMS, OF HOUSTON, TEXAS.
IMPROVEMENT IN PROCESSES OF COLORING'ENAMELED PHOTOGRAPHS,
Specification forming part of Letters Patent No. 167,485, dated September 7, 1875; application filed
June 19, 1875.To all whom it may concern:
Be it known that I, WILLIAM WIRT WIL-
LIAMi, of Houston, in the county of Harris
and State of Texas, have invented a new and
Improved Process of Coloring Enameled Pho-
tographs, of which the following is a specifi-
cation :
The object of my inventioh is to improve
that class of photographs lately introduced
under the names of " enameled photo-
graphs," "portraits-glacis," or "souvenir pic-
tures," by means of a suitable process, that
they may be produced in colors, and finished
with delicacy, beauty, and permanence with-
out the services of a skilled artist, without
danger of losing the likeness, and without the
use of warm gelatine, which would have a tend-
ency to remove or injure the coloring.
ily process consists in coating a glass
plate with a dry layer of collodio-gelatine, on
which the photograph, made transparent in
suitable manner, is pasted, backed with trans-
parent paper, to be then colored and mounted
in the usual manner.
The preparation of the glass plate first with
a coating of collodion, and then, when the
same is dry, with a coating of gelatine, allows
the preparation of a number of glass plates,
so that they are ready for use at any time,
either for the plain enameled pictures, or for
the colored ones, as desired. The pictures
may thus be attached to the glass in a few
minutes, ready for further operation without
the time and trouble required to prepare a
warm solution of gelatine, which is, moreover,
liable to spoil in warm weather. On the dry
collodio-gelatine coating the photograph is
pasted with a solution of gum-arabic after it
has been made transparent with neat's-foot oil,
or any other substance producing the came ef-
fect.
By the thin layer of gum-arabic between thedry coating of collodio-gelatine and the pic-
ture the transparency of the same is perma-
nently preserved, and, at the same time, the
oil not extracted from the paper, as would be
the case with warm gelatine, which destroys
more or less the transparency, and renders
thereby the colors less smooth and delicate.
On the back of the transparent picture a
backing of paper, made transparent in similar
manner, is applied, which gives a greater soft-
ness to the colors, and requires less skill in
coloring successfully. There is also less dan-
ger of injuring the likeness than when the pic-
ture is colored on the face and rendered trans-
parent afterward. The transparent paper pro-
duces a uniform semi-transparency, which may
be increased by laying a second thickness of
transparent paper on the photograph, to give
the desired effect to the colors.
The colors are laid on the back of the paper,
water, oil, or dry colors being used as desired.
When the coloring is finished several thick-
nesses of bristol-board are cemented to the
back of the picture, and, when dry, all is
stripped from the glass plate, together with
the collodio - gelatine surface, which adheres
firmly to the picture.
Having thus described my invention, I claim
as new and desire to secure by Letters Pat-
ent-
The process herein described of coloring
enameled photographs, consisting in first past-
ing on a glass plate coated with dry layers of
collodion and gelatine, a transparent photo-
graph, then backing it with one or more lay-
ers of transparent paper, and then laying col-
ors thereon in the usual manner, substantially
as and for the purpose set forth.
WILLIAM WIRT WILLIAMS.
Witnesses:
B. F. McD)oNUGnI,
WILL. W. HuLL.
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Williams, William W. Improvement in Processes of Coloring Enameled Photographs., patent, September 7, 1875; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth166474/m1/1/: accessed June 23, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.