Improvements in or appertaining to a Process for the Production of White, Black, or Coloured Pictures, Writing, or the like, on Glass, Porcelain, Enamel, or Metal.
Year: 1897

page_text: Date of Application, 7th Apr., 1897
Complete Specification Left, 28th June, 1897-Accepted, 14th Aug., 1897
PROVISIONAL SPECIFICATION.
Improvements in or appertaining to a Process for the Production of
White, Black, or Coloured Pictures, Writing, or the like, on Glass,
Porcelain, Enamel, or Metal.
I, FRANK ALBRECHT of 5, Rumford Place, Liverpool in the County of Lancaster,
Merchant, do hereby declare the nature of this invention to be as follows .-
-
In two Patents belonging to me, Nos. 13838 of 1893 and 24283 of 1895, a process
is set forth for ornamenting glass, porcelain, enamel, etc., by means of a strongly
basic solution. I have now found after a good deal of further experimenting that a
neutral and still more a strongly acid solution is superior to these basic solutions and
my present invention therefore consists in covering the ground previously uncovered
by these two specifications, namely, using a neutral or acid solution of silica as a
menstruum for uniting insolubly gold leaf, powdered metals (or other body colour
not injuriously affected by the heat used) to the surface of glass. In actual practice
I prefer to use a solution or mixture consisting of sixty grammes of precipitated
silica or silicic acid to one pint of commercial silicate of soda solution. It is obvious
however that gelatinous silica can be used instead of precipitated silica. Further,
that other alkaline silicates can be used instead of commercial silicate of soda
solution. In fact I have found in summer time or at any time when the air is very
dry, it is often advantageous to use the material known commercially as natrium
kalium silicate, a dry double silicate of soda and potash in place of part of the
silicate of soda and in such case may use a lesser amount of precipitated silica or use
instead gelatinous silica.
The material is painted or stamped on the glass in the manner set forth in my
previous patents, either mixed with the powdered colour or it is first stamped on the
glass and the powdered colour dusted over and pressed in. It is then afterwards
subjected to the necessary heating in the stove according to the quality of glass or
other objects used.
COMPLETE SPECIFICATION.
Improvements in or appertaining to a Process for the Production of
White, Black, or Coloured Pictures, Writing, or the like, on Glass,
Porcelain, Enamel, or Metal.
I, FRANK ALBRECHT of 5, Rumford Place, Liverpool in the County of Lancaster,
Merchant, do hereby declare the nature of this invention and in what manner
Price 8d.

page_text: the same is to be performed, to be particularly described and ascertained in and by
the following statement:-
In two Patents belonging to me, Nos. 13838 of 1893 and 24283 of 1895, a process
is set forth for ornamenting glass, porcelain, enamel etc. by means of a strongly
basic solution. I have now found after a good deal of further experimenting that
a neutral and still more a strongly acid solution is superior to these basic solutions,
and my present invention therefore consists in covering the ground previously
uncovered by these two specifications, namely, using a neutral or acid solution of
silica as a menstruum for uniting insolubly gold leaf, powdered metals (or other
body colour not injuriously affected by the heat used) to the surface of glass. In
actual practice I prefer to use a solution or mixture consisting of sixty grammes of
precipitated silica, or an equivalent amount of silicic acid as far as regards SiO,
contents, to one pint of commercial silicate of soda solution. It is obvious however
that an equivalent amount of gelatinous silica can be used instead of precipitated
silica. Further, that the chemical equivalents of other alkaline silicates can be used
instead of commercial silicate of soda solution. In fact I have found in summer
time or at any time when the air is very dry, it is often advantageous to use the
material known commercially as natrium kalium silicate, a dry double silicate of soda
and potash in place of part of the silicate of soda and in such case may use a lesser
amount of precipitated silica or use instead gelatinous silica.
The material is painted or stamped on the glass in the manner set forth in my
previous patents, either mixed with the powdered colour or it is first stamped on
the glass and the powdered colour dusted over and pressed in. It is then afterwards
subjected to the necessary heating in the stove say to about 1500 degrees
Fahrenheit according to the quality of glass or other objects used.
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 improvement in the process for the production of pictures, writing or the like
on glass, porcelain, enamel or metal, which consists in marking the glass with a
neutral or preferably acid solution of silica, and heating substantially as described
Dated this 26th dow of Tuno 1807
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham, and London, Patent Agents.