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Thinking of your weather - keep warm!
Found this today:
This step consists in applying to a cellulose nitrate or cellulose acetate support the following solution:
Potassium hydroxide___; ______________ __, 1
Ethyl alcohol _________________________ __- 1000
This solution is applied at a temperature of about
50° 0., although the temperature range may be
between 30 and 80° C. This solution will be ap
plied to one face of the support. on which it is
desired to put a non-halation coating, by means
of machines which are well known.