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.