IMPROVEMENTS IN EMBOSSING ON GLASS, PRODUCING EVERY DESCRIPTION OF DESIGN, ORNAMENTATION, LETTERS, AND DEVICES, WITH EFFECTS OF LIGHT AND SHADOW BY MEANS Of Graduated Shades
Year: 1876

page_text: LETTERS PATENT to George Hollyer, of No. 14, Sutherland Street, Walworth
Road, in the County of Surrey, S.E., Embosser & Writer on Glass, for the
Invention of "IMPROVEMENTS IN EMBOSSING ON GLASS, PRODUCING EVERY
DESCRIPTION OF DESIGN, ORNAMENTATION, LETTERS, AND DEVICES, WITH
EFFECTS OF LIGHT AND SHADOW BY MEANS Of Graduated Shades."
Scaled the 16th February 1877, and dated the 19th August 1876.
PROVISIONAL SPECIFICATION left by the said George Hollyer at the Office
of the Commissioners of Patents on the 19th August 1876.
GEORGE HOLLYER, of No. 14, Sutherland Street, Walworth Road, in the County
of Surrey, S.E., Embosser & Writer on Glass. "IMPROVEMENTS IN EMBOSSING ON
GLASS, PRODUCING EVERY DESCRIPTION OF DESIGN, ORNAMENTATION, LETTERS, AND
DEVICES, WITH EFFECTS OF LIGHT AND SHADOW BY MEANS OF GRADUATED SHADES."
1st. My Invention consists in producing light and dark shades in addition to
the results now obtained in embossing on glass; for this purpose after covering the
plate of glass to be ornamented with red lead and Brunswick black, and securing
the design by means of stencel plates set on the ground work, by using a composition
of soap, whitening, and beeswax, the open parts of the stencel plates are taken out
with turpentine rubbed in by a hog hair brush in the ordinary manner. The design
is then bit in by means of a hydrosulphuric acid diluted with equal parts of water;
the solution is suffered to remain fifteen to twenty minutes; the acid is now drawn
off and the glass cleansed of the composition of red lead and Brunswick black; it is
then further cleansed with caustic potash, and ground with flour of emery.
2. The design having been secured on the glass by the means above-mentioned,
I then proceed to employ the method which constitutes the process I claim as
any Invention. I cover the design embossed all over with a mixture of varnish
and red lead thinly laid on so as not to obscure the design; I then again
employ stencel plates cut (one) for light (and another) for the dark shades, or as
many as may be required to produce such gradations in shades as the nature of
the effect to be produced demands; the colored varnish is removed in all the open
parts of the stencel plates, the parts thus cleared are washed with milk, which is
allowed to dry on the open spaces, leaving a film on the glass; I then apply a
solution of fluoric acid reduced to the proportion of one part acid to five of water;

page_text: this is allowed to operate on the exposed portions of the glass that have been
already prepared, as described, during the space of one hour and a half to two hours,
according to the temperature; the plate is then cleaned off with water in the first
instance and afterwards with caustic potash; the effect of this operation is to
produce a dead shade, giving the under shadows (marked in the Drawing, No. 1).
3. The middle shade (marked No. 2 in the Drawing) is obtained on the glass by
the action of the acid through the film on the parts previously embossed.
4. I obtain the high lights by protecting the spaces they occupy from the action
of the above-mentioned operations (marked on Diagram, No. 3).
SPECIFICATION filed in pursuance of the conditions of the Letters Patent, and
of an Order of the Lord Chancellor, by the said George Hollyer in the Great
Seal Patent Office on the 26th February 1877.
GEORGE HOLLYER, of No. 14, Sutherland Street, Walworth Road, in the County
of Surrey, S.E., Embosser and Writer on Glass. "IMPROVEMENTS IN EMBOSSING
ON GLASS, PRODUCING EVERY DESCRIPTION OF DESIGN, ORNAMENTATION, LETTERS,
AND DEVICE, WITH EFFECTS OF LIGHT AND SHADOW BY MEANS OF GRADUATED
SHADES."
After I have embossed the plate glass in the usual way I proceed to produce the
effects of light and shadow on the pattern or design, which I claim as my sole
Invention, in the following manner-I clean the portions already embossed with a
weak solution of sulphuric acid, and afterwards cleans with water; I then lay on a
combination of red lead and Brunswick black; on this I apply stencil plates cut ex-
pressly to form the light and other plates to form the shades of the patterns already
embossed, then taking out the open parts with spirits of wine or turpentine; the
portions thus treated are washed with milk, so as to leave a film on the embossed
parts, also on the ground parts; this operation retards the too rapid action of the
acid to be laid over. The acid is then applied and suffered to remain on the glass
for the space of two hours; I then strain it off and wash the plate with caustic
potash diluted with water; this operation concludes the process and produces
distinct effects of light and shadow applicable to designs of every description. By
this process squares of glass may be decorated to any dimensions.
In the Drawings herewith supplied Fig. 1 represents a design showing three
shades, light, shadow, and middle tint or ground; Figure 2 represents ordinary
embossing.
In witness whereof the said George Hollyer hath hereunto set his hand
and seal, this Nineteenth day of February, in the year of our Lord One
thousand eight hundred and seventy-seven.