An Improved Composition for Removing Paint or Varnish from Surfaces.
Year: 1898

page_text: Date of Application, 9th July, 1898
Complete Specification Left. 30th Sept.. 1898-Accepted, 19th Nov., 1898
PROVISIONAL SPECIFICATION.
An Improved Composition for Removing Paint or Varnish from
Surfaces.
I, HERBERT JOHN HADDAN, of the Firm of Herbert Haddan & Co., of 18,
Buckingham Street, Strand, London, W.C., Civil Engineer, do hereby declare the
nature of this invention a communication to me from abroad by G. Zonca & Co.,
of Kitzingen on the Main, in the Empire of Germany, Manufacturers, to be as
follows:-
:-
The usual mordant for removing varnish, or oil color paint consists of caustic
alcali, the same however has a strongly destroying influence on organic bodies,
the color mordants containing caustic alcali can only be used in a limited measure
and with greatest carefulness. The same have not only a decomposing effect on
wood fibre, but also are a source of danger to the human skin in consequence of
their strong corroding effect. These disagreeable effects of the caustic alcali can
be removed completely and the dissolving force on the dry varnish or oil color
layer also essentially increased, when emulsions of mineral oils in the solutions of
the caustic alcali are used.
In order to keep the oil permanently in emulsion, a sufficient quantity of an
indifferent body like brick dust, powdered pumice stone, saw dust etc. is mixed in
the easily movable mass and one obtains thus a paste form very suitable for use.
This paste represents an extremely efficacious and durable color mordant, which
can be easily applied on any surface and has no injuring influence on the wood
fibres and the human skin.
For producing this new color mordant one proceeds as follows: -20 kilograms
of caustic soda (98%) are dissolved in 100 litres water, the solution is mixed
with 20 kilograms mineral oil and stirred in a kettle provided with suitable
stirring apparatus until the emulsion is effected; one adds then by stirring 20 kilo-
gram saw dust and lets the whole pass through a color mill for the purpose of
obtaining a perfectly equal mixture.

page_text: nature of this invention, a communication to me from abroad by G. Zonca & Co.,
of Kitzingen on the Main, in the Empire of Germany, Manufacturers, and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:-
The usual material for removing varnish or oil color paint consists of caustic
alcali. This however has a strongly destructive influence on organic bodies and
materials containing caustic alcali can only be used in a limited measure and
with the greatest carefulness, such having not only a decomposing effect on wood
fibre, but being also a source of danger to the human skin in consequence of their
strong corroding effect. These disagreeable effects of caustic alcali can be removed
completely and the dissolving force on the dry varnish or oil color layer also
essentially increased if emulsions of mineral oils in the solutions of the caustic
alcali are used.
In order to keep the oil permanently in emulsion, a sufficient quantity of an
indifferent body like brick dust, powdered pumice stone, saw dust or the like mixed
with the liquid to form a paste which is very suitable for use.
This paste represents an extremely efficacious and durable material or composi-
tion which can be easily applied on any surface and has no injurious influence
on wood fibre or the human skin.
For producing this new composition 20 kilograms of caustic soda (98%) are
dissolved in 100 litres of water, the solution is mixed with 20 kilograms of mineral
oil and stirred in a vessel provided with suitable stirring apparatus until the
emulsion is effected; 20 kilograms of saw dust are then added while stirring and
the whole passed through a color mill for the purpose of obtaining a perfectly
equal mixture.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A composition for removing varnish and oil paint wherein mineral oil is
emulsified in a solution of caustic alcali.
2. A composition for removing varnish and oil paint wherein mineral oil is
emulsified in a solution of caustic alcali and made into a paste with an indifferent
material such as brick dust, powdered pumice stone, saw dust or the like.
3. A composition consisting of caustic soda, water, mineral oil and an indifferent
powder in the proportions herein described and for the purpose set forth.
Dated this 30th day of September 1898.