by James M. Reilly
published by the Image Permanence Institute
This is a four-part publication designed to explain the effect of temperature and humidity on the rate of film degradation. It is a useful tool for evaluating and planning storage environments for all types of acetate base film, cinema film, and microfilm. Environmental specifications for film storage are covered, and the relationship between temperature, relative humidity, and the time it takes for “vinegar syndrome” (the slow, chemical decomposition of acetate plastics) to begin to affect fresh film is explained. Valuable quantitative data for the reader to use with his own collection is provided in three easy-to-use forms: a wheel (like a circular slide rule) with temperature/humidity data and corresponding film life expectancies, graphs, and a time-out-of-storage table. Paperback.