Manufacture of a Celluloid-like Substance.
Year: 1899

page_text: Date of Application, 26th July, 1899
Complete Specification Left, 25th Apr., 1900-Accepted, 26th May, 1900
Manufacture of a Celluloid-like Substance.
I, OLIVER IMRAY, of Birkbeck Bank, Chambers, Southampton Buildings, in the
County of London, Chartered Patent Agent, do hereby declare the nature of this
invention (as communicated to me from abroad by The Farbwerke, vormals
Meister Lucius & Brüning, of Hoechst a/Main, Germany, Chemical Manufacturers)
to be as follows:-
My foreign correspondents have found that by adhering to certain conditions in
mixing collodion and gelatine, a substance inay be obtained which possesses the
transparency, elasticity and resistance of celluloid and has the advantage over
celluloid that it does not roll up when employed as a substitute for plates in
photography.
EXAMPLE.
18 parts by weight of collodiou cotton (slightly nitrated cotton) are dissolved
in 16 parts by weight of glacial acetic acid by heating on the water bath and
stirring to this solution are added 5 parts by weight of gelatine; after some
time, when the gelatine has swelled, 75 parts by weight of alcohol of 96 per
cent. strength are gently and gradually added, while the mixture is stirred.
The solution, thus obtained is allowed to dry. The dried substance is then
carefully washed in water to which a trace of soda-lye may be added, and is again
dried. The manufacture of this celluloid-like substance is now complete.
To produce certain shapes it is preferable to pour the solution before drying
into suitable moulds to form plates, tubes or other articles. This presents no
difficulty as the solution is of syrupy consistence.
For making thin plates, it is best to dilute the solution with glacial acetic
acid and alcohol, preferably in the proportion of 16 to 75 parts by weight, and
to pour the dilute solution upon a surface such as glass plates for instance;
it is then dried and washed as above described.
The thin plates thus obtained are especially suitable for photographic purposes,
as support for the sensitised layer, they have the great advantage over the usually
employed celluloid films that they remain flat in the developing bath; they do
not chemically influence the sensitised emulsion and thus give rise to fog; they
do not alter like the celluloid films, from which camphor crystallises, and finally
they do not, like celluloid films, influence the development of the image in
consequence of electric phenomena.
Dated this 26th day of July 1800
ABEL & IMRAY,
Agents for the Applicants.

page_text: invention (as communicated to me from abroad by The Farbwerke, vormals
Meister Lucius & Brüning, of Hoechst a/Main, Germany, Chemical Manufacturers)
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:―
My foreign correspondents have found that by adhering to certain conditions in
mixing collodion and gelatine, a substance may be obtained which possesses the
transparency, elasticity and resistance of celluloid and has the advantage over
celluloid that it does not roll up when employed as a substitute for plates in
photography.
The following example illustrates this invention.
18 parts by weight of collodion cotton (slightly nitrated cotton) are dissolved
in 16 parts by weight of glacial acetic acid by heating on the water bath and
stirring to this solution are added 5 parts by weight of gelatine after some
time, when the gelatine has swelled, 75 parts by weight of alcohol of 96 per
cent. strength are gently and gradually added, while the mixture is stirred.
The solution thus obtained is allowed io dry. The dried substance is then
carefully washed in water to which a trace of soda-lye may be added, and is again
dried. The manufacture of this celluloid-like substance is now complete.
To produce certain shapes it is preferable to pour the solution before drying
into suitable moulds to form plates, tubes or other articles. This presents no
difficulty as the solution is of syrupy consistence.
For making thin plates it is best to dilute the solution with glacial acetic
acid and alcohol preferably in the proportion of 16 to 75 parts by weight, and
to pour the dilute solution upon a surface such as glass plates for instance;
rt is then dried and washed as above described.
The thin plates thus obtained are especially suitable for photographic purposes,
as support for the sensitised layer; they have the great advantage over the usually
employed celluloid films that they remain flat in the developing bath, they do
not chemically influence the sensitised emulsion and thus give rise to fog; they
do not alter like the celluloid films, from which camphor crystallises, and finally
they do not, like celluloid films, influence the development of the image in
consequence of electric phenomena.
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 manufacture of a celluloid-like substance by first dissolving collodion
cotton in glacial acetic acid, then adding to this solution gelatine and, after
some time, alcohol, then evaporating the solution thus obtained and finally washing
the residue with water, substantially as described.
2. The celluloid-like substance manufactured as above set forth.
Tind this +1. 1
1 1000
ABEL & IMRAY,
Agents for the Applicant