Publisher's Synopsis
Excerpt from Celluloid: Its Raw Material, Manufacture, Properties and Uses
Subsequently improvements were introduced, consisting in the employment of collodion dissolved in wood spirit mixed with drying oils, treated according to the degree of elasticity required with 2 to 10 per cent. Of sulphur chloride, together with an addition of carbon disulphide to check the violence of the reaction, the resulting product being incorporated with varying proportions of dissolved gun-cotton, which, according to the result desired, seldom exceeded 20 per cent. By warming, this mass is converted into a pasty condition, enabling it to be moulded into any desired shape. The products obtained in this way were very handsome, and included sheets in various colours, imitation marble patterns, combs, knife handles, etc. The solvent employed facilitated the introduction Of various colouring agents (coal-tar dyes in particular) into the mass; while powdered colours could also be incorporated by rolling or kneading.
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