An Improved Agent to be used in the Metallic Decoration and Lettering of Glass.
Year: 1890

page_text: Date of Application, 24th Nov., 1890
Complete Specification Left, 5th Aug., 1891-Accepted, 21st Nov., 1891
PROVISIONAL SPECIFICATION.
An Improved Agent to be used in the Metallic Decoration and
Lettering of Glass.
I, WILLIAM HENRY WILLOUGHBY, of No. 220, Regent Street, London, W.,
Manufacturer, do hereby declare the nature of this invention to be as follows:
This invention relates to an improved agent to be used in the metallic decoration
and lettering of glass, and has more particular reference to ornamenting it in
silver.
In carrying the invention into effect, chloride of silver is prepared by adding
common salt to a hot aqueous solution of nitrate of silver. The precipitate is
then dried.
Dry borax and lead precipitate in suitable proportions (say one to two) are
ground together with (say) one part of glass of the same body as that to be
decorated, and the whole fused at a great heat, turned out and afterwards
pulverized.
The chloride and the pulverized borax, lead, and glass are next mixed in pro-
portions of say ten to one, (more or less according to circumstances), ground in
excess of pine spirit residuum, say twenty times as much, by weight. This last
step produces the ornamenting agent which is applied to the glass and burnt in.
The above process may be applied to ornamenting with any other metal besides
silver provided that the chemical reactions above described are possible.
Dated this 24th day of November 1890.
PHILLIPS & LEIGH,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Agent to be used in the Metallic Decoration and
Lettering of Glass.
I, WILLIAM HENRY WILLOUGHBY of No. 220 Regent Street, in the County
of London, Manufacturer, do hereby declare the nature of this invention, and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:-
My invention relates to an improved agent to be used in the metallic decoration
and lettering of glass, and has more particular reference to ornamenting it in
silver.
In carrying this invention into effect, chloride of silver is prepared by adding
common salt to a hot aqueous solution of nitrate of silver. The precipitate is
then dried.
Dry borax and lead precipitate in suitable proportions (say one to two) are
ground together with (say) one part of glass of the same body as that to be
decorated, and the whole fused at a great heat, turned out and afterwards
pulverized. The above mentioned lead precipitate is the same as is used in the
manufacture of flint glass. It is also known as red lead or minium and has the
composition Pb₂O.
The chloride and the pulverized borax, lead precipitate, and glass are next
mixed in proportions of (say) ten to one (more or less according to circumstances),
ground in excess of pine spirit residuum, or its equivalent, (say) twenty times as
much by weight. This last step produces the decorating agent which is applied to
the glass and then burnt in.

page_text: 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,
1. An agent for decorating or lettering glass, consisting of borax, lead precipitate,
and glass, fused together and subsequently ground up in combination with chloride
of silver as set forth.
2. The herein before described process of producing an agent for the metallic
decoration or lettering of glass, consisting in fusing a mixture of borax, lead pre-
cipitate and glass, pulverising it and grinding it and chloride of silver up together
in pine spirit residuum or its equivalent, as set forth.
Dated this 5th day of August 1891.
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.