Evaluation of motion-picture film for permanent records/
Charles G Weber, John Hill · 1937
In previous publications, the results have been reported of studies on the stability of motion-picture film and its care in libraries.To assist the user of film in securing a material of high quality, this paper gives detailed test methods for determining folding endurance, pH, copper number, and relative viscosity.It is suggested that for record purposes film having a base of cellulose acetate that is free from cellulose nitrate be required.The cellulose acetate film should