Improvements in the Means or Materials for Decorating, Colouring, and Enamelling Glass, Earthenware, and Metals.
Year: 1892

page_text: Date of Application, 21st July, 1892
Complete Specification Left, 20th Apr., 1893-Accepted, 21st July, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Means or Materials for Decorating, Colouring,
and Enamelling Glass, Earthenware, and Metals.
I, Dr. FELIX OHM, of Coelln on the Elbe, near Meissen, Kingdom of Saxony,
German Empire, Chemist, do hereby declare the nature of this invention to be as
follows:-
This invention refers to the production of precipitated metallic silicates or
metallic borsilicates to be used for glazing, enamelling, colouring and decorating
ceramic products in a burnt or not-burnt or rough state and for glass and
metalware.
According to this invention metallic silicates or metallic borsilicates are
produced by precipitating neutral solutions of metallic salts by soluble glass
(water-glass) with or without solution of borax. For example, for producing
borsilicate of cobalt a neutral solution of sulphate of cobalt is first mixed with a
predetermined or calculated quantity of solution of borax, according to the
desired proportion of boracic acid to silicic acid, and afterwards the mixture is
mixed with soluble glass (water-glass) up to the complete precipitation of
borsilicate of cobalt.
The precipitate thus obtained is well and thoroughly dried, if necessary by
exposing it to glowing heat, and is afterwards used as glaze or colour, either alone
or mixed with other glazing materials such as quartz, boracic acid, oxide of.lead,
oxide of tin, for the glazing, enamelling or colouring of ceramic products and of
glass and metalware in the usual manner.
Dated this 21st day of July 1892
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Means or Materials for Decorating, Colouring,
and Enamelling Glass, Earthenware, and Metals.
I, Dr. FELIX Oнм, of Coelln on the Elbe, near Meissen, Kingdom of Saxony,
German Empire, Chemist, 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 :-
This invention has reference to the manufacture or production of precipitated
metallic silicates or metallic boro-silicates to be used for glazing, enamelling,
colouring and decorating ceramic products in a burnt or not-burnt or rough state,
and glass and metal ware.
According to this invention metallic silicates or metallic boro-silicates are
produced by precipitating neutral solutions of metallic salts by soluble glass
(water-glass) with or without solution of borax according as a boro-silicate or
simple silicate is to be produced. For example, for producing boro-silicate
of cobalt, a neutral solution of sulphate of cobalt is first mixed with a predetermined
or calculated quantity of solution of borax, according to the desired proportion
of boracic acid to silicic acid, and afterwards the mixture is mixed with a solution
of soluble glass (water-glass) up to the complete precipitation of boro-silicate of
cobalt.

page_text: After
Suitable proportions to employ are fifty parts by weight of sulphate of cobalt
and forty parts by weight of crystallised borax cach dissolved in water.
the two solutions have been well mixed, I add so much of a solution of water
glass as will precipitate that portion of the cobalt solution not already precipitated,
in order to obtain a metallic oxide combined with boracic acid and silicic acid.
This compound will be the more easily fusible the greater the proportion of boracic
acid present therein.
To precipitate a metallic silicate alone, the borax is omitted.
The precipitate thus obtained is well and thoroughly dried, if necessary by
exposing it to glowing heat, after which it is ready to be used as glaze or colour,
either alone or mixed with other glazing materials such as quartz, boracic acid,
oxide of lead, oxide of tin, for the glazing, enamelling or colouring of ceramic
products and of glass and metalware in the usual manner.
My invention may advantageously be used for the production of silicates and
boro-silicates of the alkaline earth metals, these being precipitated from solutions
of the alkaline earthy metals or from solutions of such metals and borax
respectively by a solution of water glass as before.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
For decorating colouring and enamelling glass, earthenware, and metals,
material consisting of an alkaline earthy or other metallic silicate, or of an
alkaline earthy or other metallic boro-silicate produced by precipitation from a
solution of an alkaline carthy or other metal, or from a solution of an alkaline
earthy or other metal and borax, as the case may be, by means of a solution of
water glass substantially as herein described.
Dated this 20th day of April 1893
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.Č., Agent for the Applicant..