Process for the preparation of cellulose acetate film

A process for the preparation of a cellulose acetate film which comprises the steps of:

• cooling a mixture of cellulose acetate and an organic solvent to a temperature of -100.degree. to -10.degree. C., said cellulose acetate having an average acetic acid content in the range of 58.0 to 62.5%, said cellulose acetate being contained in the mixture in an amount of 10 to 40 wt %, and said organic solvent consisting essentially of acetone;
• warming the cooled mixture to a temperature of 0.degree. to 50.degree. C. to dissolve the cellulose acetate in the organic solvent;
• casting the obtained solution on a support;
• and
• evaporating the organic solvent to form the cellulose acetate film.