The purpose of this report is to acquaint all personnel with some technical aspects of micrographics. The various film types used in the production of microfiche are discussed, including silver halide, diazo, and vesicular films. Other imaging systems used in micrographics are reviewed, and a basic introduction to sensitometry is given. The archival considerations of micrographics are explained in terms of their use properties and image stability, as well as prediction of image stability by chemical kinetics. The microfiche testing program currently underway at the Government Printing Office is reviewed, and recommendations for the use of the three primary types of film are offered. (RAO)