Improvements in Enamels or Colours for Earthenware, Glass, and the like.
Year: 1899

page_text: Date of Application, 18th Aug., 1899
Complete Specification Left, 21st Apr., 1900-Accepted, 26th May, 1900
PROVISIONAL SPECIFICATION.
Improvements in Enamels or Colours for Earthenware, Glass,
and the like.
I. RICHARD ZSIGMONDY, Doctor of Philosophy, of Blumenstrasse 1, at Jena,
Grand-duchy of Saxe-Weimar, Germany, do hereby declare the nature of this
invention to be as follows:
The present invention relates to the manufacture of lustre-colours which, after
being burnt in porcelain, or stone-ware, or glass, appear as fine colours such as
purple, or vermilion, or rose colour.
For the purpose of preparing lustre-colours of this kind, solutions of organic
silicides and organic solutions of gold are needed as for preparation of lustre-
gold.
The solutions of the organic silicides are obtainable by mixing an alcohol,
or an essential oil, or a solution of resin, or several or all of these organic liquids
with chloride of silicon, and vaporizing the excess of the said chloride.
For instance a mingling of 20 grammes benzylic alcohol and 30 grammes
mitcham-oil and 50 grammes turpentine-oil may be mixed with 15 grammes
chloride of silicon. This mixture after having been boiled down to 37 grammes,
is anew commingled with 15 grammes mitcham-oil and 20 grammes turpentine-
oil, and then again concentrated by boiling up to 37 grammes.
Instead of chloride of silicon: bromide, iodide, fluoride, oxychloride or chloro-
form of silicon, and instead of an alcohol: a ketone, a mercaptan, an aldehyde
or a non-saturated hydrocarbon may be substituted for.
The solution of silicon prepared as above is now to be mixed with the solution
of gold or with the trading lustre-gold, the proportion of the components being
such that 02 to 5 parts of weight of silicic acid are associated with 1 part of
weight of metallic gold.
At the proportion of 1 part of weight of gold to 1 part of weight of silicic
acid, vermilion colours are produced. In the case of applying a larger quantity
of gold, purple lustre-colours, and in the case of a larger quantity of silicic acid,
rose lustre-colours are obtained.
For the purpose of preventing the colour burnt-in from gradually changing
its tint, and at the same time of slightly varying this tint, I may add one or
several dissolved metallic oxides to the solution prepared as described. Resinate
of bismuth produces a violet tint, whilst resinates of lead, zinc, barium, strontium,
calcium, cerium and zirconium have less influence on the final tint of the lustre-
colour.
In order to obtain ruby or yellowish-red lustre-colours, an organic compound
of silver which is soluble in essential oils (for instance resinate of silver), is still
to be added to the mixture. These silvery lustre-colours must pass through the
muffle with a comparatively low temperature, and the muffle must be exempt
from fire gases.
Dated this 10th day of August 1800

page_text: QUALILLE SPECIFICATION.
Improvements in Enamels or Colours for Earthenware, Glass,
and the like.
I, RICHARD ZSIGMONDY, Doctor of Philosophy, of Blumenstrasse 1, at Jena,
Grand-duchy of Saxe-Weimar, Germany, 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 present invention relates to the manufacture of lustre-colours which, after
being burned in porcelain, or stone-ware, or glass, appear as fine colours such as
purple, or vermilion, or rose colour.
For the purpose of preparing lustre-colours of this kind, solutions of organic
silicides and organic solutions of gold are needed as for preparation of lustre-
gold.
The solutions of the organic silicides are obtainable by mixing an alcohol,
or an essential oil, or a solution of resin, or several or all of these organic liquids
with chloride of silicon, and vaporizing the excess of the said chloride.
For instance a mingling of 20 grammes benzylic alcohol and 30 grammes
mitcham-oil and 50 grammes turpentine-oil may be mixed with 15 grammes
chloride of silicon. This mixture after having been boiled down to 37 grammes,
is anew commingled with 15 grammes mitcham-oil and 20 grammes turpentine-
oil, and then again concentrated by boiling up to 37 grammes.
Instead of chloride of silicon: bromide, iodide, fluoride, oxychloride or chloro-
form of silicon, and instead of an alcohol: a ketone, a mercaptan, an aldehyde
or a non-saturated hydrocarbon may be substituted for.
The solution of silicon prepared as above is now to be mixed with the solution
of gold or with the trading lustre-gold, the proportion of the components being
such that 0'2 to 5 parts of weight of silicic acid are associated with 1 part of
weight of metallic gold.
At the proportion of 1 part of weight of gold to 1 part of weight of silicic
acid, vermilion colours are produced. In the case of applying a larger quantity
of gold, purple lustre-colours, and in the case of a larger quantity of silicic acid,
rose lustre-colours are obtained.
For the purpose of preventing the colour burnt-in from gradually changing
its tint, and at the same time of slightly varying this tint, I may add to the
solution prepared as described organic compounds, for instance resinates of two
of the following metals: lead, zinc, barium, strontium, calcium.
In order to obtain ruby or yellowish-red lustre-colours, an organic compound
of silver which is soluble in essential oils (for instance resinate of silver) is still
to be added to the mixture together with organic compounds of one or several of
the following metals: bismuth, lead, zinc, barium, strontium, calcium, cerium,
zirconium. These silvery lustre-colours must pass through the muffle with a
comparatively low temperature, and the muffle must be exempt from fire-gases.
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. The process of preparing lustre-colours consisting in mixing a liquid organic
silicide with an auriferous organic liquid such as lustre-gold or one of its inter-
mediate produces at the following proportion: 02 to parts of weight of silicic
acid to 1 part of weight of metallic gold, essentially as described.

page_text: 2. In the process claimed above the addition of organic compounds of two of
the following metals; lead, zinc, barium, strontium, calcium, essentially as
described.
3. In the process claimed in No. 1 the addition of an organic compound of
silver together with organic compounds of one or several of the following metals:
bismuth, lead, zinc, barium, strontium, calcium, cerium, zirconium, essentially
as described.
4. A liquid lustre-colour containing organic compounds of silicon of gold, and
of two of the following metals: lead, zinc, barium, strontium, calcium, essentially
as described.
5. A liquid lustre-colour containing organic compounds of silicon, of gold,
of silver, and of one or several of the following metals: bismuth, lead, zinc,
|barium, strontium, calcium, cerium, zirconium, essentially as described.
Dated this 10th day of Anril 1900
D. RICHARD ZSIGMONDY.