A New or Improved Composition for Treating Paper and similar Material to Render Writings or other Markings Indelible thereon.
Year: 1889

page_text: Date of Application, 17th Oct., 1889
Complete Specification Left. 18th Nov., 1889-Accepted, 21st Dec., 1889
PROVISIONAL SPECIFICATION.
A New or Improved Composition for Treating Paper and similar
Material to Render Writings or other Markings Indelible thereon.
I, DAVID CUMMING SIMPSON of 8 Saint James Place in the City of Edinburgh,
Engraver and Printer, do hereby declare the nature of this Invention to be as
follows:-
My Invention consists of a new or improved composition or solution for preparing
paper or similar materials to render writings or other markings thereon indelible. The
composition or solution constituting the Invention consists of a chemical preparation of
lead, potassium and copper, preferably the acetate of lead, the chlorate of potass, and
the acetate of copper soluble in water. I use these materials in or about the following
proportions viz. :-1 lb. acetate of lead; lb. chlorate of potass; 1 oz. of the acetate
of copper soluble in water to 1 gallon of water (preferably distilled, river or rain
water) but these proportions may be varied according to the nature of the substances
to which the solution is to be applied.
The solution is applied by immersion or by coating with a brush or sponge or it
may be incorporated in the pulp in the manufacture of paper, cardboard or manilla,
the effect in any case being that the ink or other writing printing or marking material
subsequently used becomes indelible in water, thereby enabling said material to be
exposed to wet or damp without being materially affected thereby.
Dated this Sixteenth day of October 1889.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
A New or Improved Composition for Treating Paper and similar
Material to Render Writings or other Markings Indelible thereon.
I, DAVID CUMMING SIMPSON of 8 Saint James Place in the City of Edinburgh,
Engraver and Printer, 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 :-
My invention consists of a new or improved composition or solution for preparing
paper or similar materials to render writings or other markings thereon indelible. The
composition or solution constituting the Invention consists of chemical preparations of
lead, potassium and copper, preferably the acetate of lead the chlorate of potass, and
the acetate of copper soluble in water. I use these materials in or about the following
proportions viz. -1 lb. acetate of lead; lb. chlorate of potass; 1 oz. of the acetate
of copper soluble in water to one gallon of water (preferably distilled river or rain
water) but these proportions may be varied according to the nature of the substances
to which the solution is to be applied.
The solution is applied by immersion or by coating with a brush or sponge or it
may be incorporated in the pulp in the manufacture of paper cardboard or manilla,
the effect in any case being that the ink or other writing printing or marking material
subsequently used becomes indelible in water, thereby enabling said material to be
exposed to wet or damp without being materially affected thereby.

page_text: 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 :
For the treatment of paper and the like to render writings or markings indelible
thereon the new or improved composition herein before described.
Dated this Sixteenth day of November 1889.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.