Improvements in Ornamenting Glass.
Year: 1887

page_text: Date of Application, 30th Nov., 1887
Complete Specification Left, 30th Aug., 1888
Complete Specification Accepted, 5th Oct., 1888
Improvements in Ornamenting Glass.
I THOMAS WILKES WEBB of Stourbridge Glass Works, Stourbridge in the County
of Worcester, Manufacturer do hereby declare the nature of this invention to be
as follows:
The object of the present invention is to produce a novel and highly ornamental
effect in glass, viz., an imitation of old carved ivory.
In carrying out my invention, I take any desired form of article, say a vase, of
ivory or white opaque glass, blown in moulds or otherwise produced by usual glass
house methods. Upon this vase I produce any desired pattern or design (a branch of
the vine, for instance, with its leaves and grapes) to represent the carvings on ivory
in the following manner.
The vase is painted or printed upon with an acid resisting substance, and then
submerged in hydro fluoric acid, which eats away the surface not so protected, and
leaves the surface beneath the resist in relief. This eating away by acid may be
supplemented by cutting or engraving, to give additional prominence or delicacy where
required, or in some instances the action of the acid will not be necessary, as for
instance when it is desired to obtain the effect of sharp or deep carvings.
Having thus produced any desired pattern upon the vase, the acid resist is entirely
removed, and the vase polished.
The old appearance is produced upon the vase by tinting the same with brown or
other suitable color, applying the color more darkly in some parts than in others, so
as to give the effect of increased prominence to the prominent parts, as well as an
aged appearance to the whole. Thus, the markings and the veins of the vine leaves
will receive a dark tint, which is readily applied and retained in the lines made by
the acid or the engraving tool, and the prominent parts of the leaves and stem will
receive and retain but little color.

page_text: After tinting, the vase is fired to fix the color in any well known manner.
The effect produced upon an article of white opaque glass by treating it as above
described is very striking and ornamental, and the imitation of old carved ivory is
exceedingly close.
BAL
1
1 T
1. 1007
I, THOMAS WILKES WEBB of Stourbridge, Glass Works, Stourbridge in the County
of Worcester, Manufacturer, 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 the present invention is to produce a novel and highly ornamental
effect in glass, viz., an imitation of old carved ivory.
In the accompanying drawing I have shown a vase in the various stages of the
process, Fig. 1 being an elevation of an opaque glass vase before the process is
commenced. Fig. 2 a similar view, showing the first stage of the process of
ornamentation, and Fig. 3 a similar view, showing the process completed.
In carrying out my invention, I take any desired form of article, say a vase, of
ivory or white opaque glass (see Fig. 1.), blown in moulds, or otherwise produced by
usual glass house methods. Upon this vase I produce any desired pattern or design
(a branch of the vine, for instance, with its leaves and grapes, see Fig. 2), to represent
the carvings on ivory, in the following manner :-
The vase is painted or printed upon with an acid resisting substance, and then
submerged in hydro fluoric acid, which eats away the surface not so protected, and
leaves the surface beneath the resist in relief. This eating away of the ground by acid
may be supplemented by cutting or engraving with a wheel, or otherwise, to give
additional prominence or delicacy where required, or in some instances, the action of the
acid will not be necessary, as for instance, when it is desired to obtain the effect of
sharp or deep carvings.
The desired pattern having thus been produced in outline upon the vase, the acid
resist is entirely removed, and the veinings upon the leaves and other marks are
produced by the wheel or graver (see Fig. 3), the vase being then polished.

page_text: The appearance of old carved ivory is produced upon the vase by tinting the same
with brown or other suitable colour, applying more colour in some parts than in others,
so as to give the effect of increased prominence to the prominent parts, as well as an
aged appearance to the whole (see Fig. 3). Thus the markings and the veins of the
vine leaves will receive a dark tint, which is readily applied, and retained in the lines,
and the prominent parts of the leaves and stein will receive and retain but little or no
colour.
After tinting, the vase is fired to fix the colour in any well known manner.
The effect produced upon an article of white opaque glass by treating it as above
described is very striking and ornamental, and the imitation of old carved ivory is
exceedingly close.
Beautiful effects may also be obtained by tinting in other and bright colours, the
process being otherwise the same.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is :-
The process herein before described for ornamenting glass, and consisting of painting
or printing a pattern with an acid resist upon an opaque glass article, and submitting
the article to the action of acid to remove the surface of the uncovered portions,
marking the veins or otherwise completing the pattern with acid or a cutting wheel,
and tinting the ground and parts of the pattern with glass colour, which is fixed by
firing, substantially as set forth.
Dated this 20th J
A
1000