SYNONYMS: Soluble gun-cotton, Colloxylin, Collodion cotton, Lana
collodii. Preparation.—"Purified cotton, one hundred grammes
(100 Gm.) [3 ozs. av., 231 grs.]; nitric acid, fourteen hundred
cubic centimeters (1400 Cc.) [47 fl℥, 163♏]; sulphuric acid,
twenty-two hundred cubic centimeters (2200 Cc.) [74 fl℥, 187♏];
alcohol, ether, water, each, a sufficient quantity. Mix the
acids gradually in a glass or porcelain vessel, and, when the
temperature of the mixture has fallen to 32° C. (90° F.), add
the purified cotton. By means of a glass rod imbue it thoroughly
with the acids, and allow it to macerate, until a sample of it,
taken out, thoroughly washed with a large quantity of water, and
subsequently with alcohol, and pressed, is found to be soluble
in a mixture of one (1) volume of alcohol and three (3) volumes
of ether. Then remove the cotton from the acids, transfer it to
a larger vessel, and wash it, first, with cold water, until the
washings cease to have an acid taste, and then with boiling
water, until the