Improvements in the Manufacture of Paint and Pigments.
Year: 1889

page_text: Date of Application, 29th Jan., 1889
Complete Specification Left, 29th Oct., 1889-Accepted, 7th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Paint and Pigments.
I ROBERT STONE of 8 Talbot Court in the City of London, Engineer do hereby
declare the nature of my said invention to be as follows :-
My invention consists in a novel method for manufacturing paint for general
purposes which I now proceed to fully describe.
Firstly. For the body of the paint I make use of china clay, glass, marble spar or
shale, or partly matured river mud, or any other substance or material of a fine
silky nature, and in treating the above mentioned materials or substances, I grind
them to a powder and in order to prevent contraction in the materials or substances,
I mix and burn it with any highly heating liquids or chemicals such as petroleum,
spirit petroleum, vitriol, or nitric acid, or any other liquids or chemicals.
Materials or substances treated under this process will maintain a lasting color
and not be liable to fade as well as being fire and waterproof.
Secondly. In some instances I may use the before mentioned materials or substances
without grinding them to a powder, simply soaking them in the aforesaid liquid or
chemicals, when the materials or substances are burned I grind them to a fine powder
and mix them with ordinary oils and driers ready for use.
Thirdly. In some instances I may burn the aforementioned materials or substances
by ordinary fuel under blast furnace beat and I may also treat the same by levigation
or other refining process either before or after treatment by heat or chemicals.
Dated 29th January 1889.
GEO. DOWNING,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Paint and Pigments.
I, ROBERT STONE, of 8 Talbot Court, in the City of London, Engineer, do hereby
declare the nature of my said invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
My invention consists in novel methods of manufacturing paint for general
purposes.
For the body of the paint, I make use of one or more of the following substances,
riz.-China clay, marble, spar, sbale, partly matured river mud, Devonshire or
Staffordshire clay, or any other substance of a fine fibrous or silky nature.
I mix such one or more of the aforesaid substances as may be selected, with one or
more of the following liquids, viz. -petroleum oil, petroleum spirit, sulphuric acid,
nitric acid, or sodium silicate, and burn such mixture. The effect of this procedure
is that it not only reduces the substances used to a more or less fluid state, but also
imparts colour thereto.
Other colouring matter may be added to the mixture in order to vary the colour
according to requiroments. Such colours are permanent and not likely to fade, and
the resultant material is also fire and watorproof.
1 sometimes grind the materials forming the body of the paint, previously to
mixing the same with the liquids, and in other cases I grind them, after burning.
In either case they are ground to a fine powder. I then mix the material, so manu-
factured, with ordinary oils and driers ready for use, or with sodium silicate only,
dispensing with oils.

page_text: I sometimes expose the first before mentioned solid materials to the heat of a blast
furnace, without the addition of the liquids secondly above mentioned.
1 also sometimes treat the materials by levigation, either before or after the exposure
to heat and mixture with the liquids.
In proportioning the materials.to form pigments, I find that one ton of any one or
more of the first mentioned materials requires, 12 gallons of petroleum, or 12 gallons
of sulphuric acid, or 12 gallons of nitric acid, or 12 gallons of sodium silicate. Such
proportions being however subject to modification, according to the relative moisture
or dryness of the substances made use of.
When mixing with oil, turpentine, and dryers, such last mentioned materials are
added according to the required fluidity, in the usual manner, as well understood by
painters; being made thick or thin as required.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
The improvements in the manufacture of paint and pigments, substantially as
Dated 29th October 1889.
GEO. DOWNING,
8, Quality Court, London, W.C., Agent for the Applicant.