Improved Composition for the Manufacture of Celluloid.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improved Composition for the Manufacture of Celluloid.
I, JULES CHAUBET, of 13, Rue Caumartin, Paris, in the Republic of France,
Engineer, do hereby declare the nature of this invention to be as follows:
Hitherto celluloid has been produced by mixing pyroxyline with camphor
and alcohol or other liquid solvents. Flexibility has been obtained by the
addition of castor oil, and any desired tint by adding colouring matter.
In a previous application for Patent No. 13287 of 1899 I described a new com-
position in which a part of the camphor was replaced by naphthalene.
The present invention has for its object the production of a novel composition
in which camphor is completely excluded.
The composition of the improved celluloid is as follows:-
Nitrated cellulose
Alcohol
Acetone
Naphthalene
-
1.000 parts.
600 parts.
-
300 parts.
100 parts.
It must be understood that I may adopt any appropriate method for effecting
the admixture and I may also modify the proportions named according to the
qualities which it is desired the product should possess.
From a technical point of view the advantage to be realised is a considerable
lowering of the cost price owing to the great difference of cost existing between
camphor and naphthalene.
The product obtained has all the properties of ordinary celluloid; and the
particular odour of naphthalene, which is not more disagreeable than that of
camphor, disappears like the latter when the material has been exposed for some
time to the air.
It will be understood that the solvents, that is to say, the alcohol and the
acetone may be replaced by any other suitable solvents.
Dated this 9th day of October 1899.

page_text: same is to be performed, to be particularly described and ascertained in and by
the following statement:-
--
Hitherto celluloid has been produced by mixing pyroxyline with camphor
and alcohol or other liquid solvents. Flexibility has been obtained by the
addition of castor oil, and any desired tint by adding colouring matter.
In a previous application for Patent No. 13287 of 1899 I described a new com-
position in which a part of the camphor was replaced by naphthalene.
The present invention has for its object the production of a novel composition
in which camphor is completely excluded.
The composition of the improved celluloid is as follows:-
Nitrated cellulose.
Alcohol
Acetone
Naphthalene
1.000 parts.
600 parts.
300 parts.
100 parts.
F
It must be understood that I may adopt any appropriate method for effecting
the admixture and I may also modify the proportions named according to the
qualities which it is desired the product should possess.
From a technical point of view the advantage to be realised is a considerable
lowering of the cost price owing to the great difference of cost existing between
camphor and naphthalene.
The product obtained has all the properties of ordinary celluloid: and the
particular odour of naphthalene, which is not more disagreeable than that of
camphor, disappears like the latter when the material has been exposed for some
time to the air.
It will be understood that the solvents, that is to say, the alcohol and the
acetone may be replaced by any other suitable solvents.
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:
-
A new composition for the preparation of substances analogous to celluloid,
this composition consisting of a mixture of nitrated cellulose, alcohol, acetone
and naphthalene, in which the solvents, namely, the alcohol and the acetone,
may be replaced by any other suitable solvents.
Dated this 28th day of May 1900.
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents, 62, Saint Vincent Street," Glasgow,
Agents for the Applicant.