History of 19th-century printing, plus how to identify types of prints, deterioration, collection management, storage, handling and display.

Introduces concept of the Time Weighted Preservation Index (TWPI), which provides a new way to measure and quantify how changes in temperature and humidity affect the preservation quality of storage environments for collections of paper, photographs, and magnetic tapes.

"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"--Publisher's description.