A-D Strips

The main purpose of A-D Strips is to determine the approximate extent of acetate support degradation in individual films, but they may also be used as a survey tool for gaining an overview of the condition of films in an entire collection and for providing a very accurate picture of storage and duplication needs. Three types of plastic have been used in film manufacture: Nitrate was used from 1890–1950, acetate from 1925 to the present, and polyester from 1960 to the present. A-D Strips are recommended for use only with acetate film. The film may be in any format: sheet film, roll film, cinema film, or microfilm.

• Included: 250 detector strips, a colour reference pencil and complete instructions.