Current research on preservation of archival records on silver-gelatin type microfilm in roll form

Abstract

This is a progress report on a study of aging blemishes on microfilm and measures to prevent their formation. Recommendations, based on current information, include: avoiding excessive densities, avoiding physical damage to the film, the use of potassium iodide in the fixer, thorough washing, uniform drying, storage at low temperature and humidity in sealed containers, avoidance of airborne reactants, increased archival use of positive copies, and periodic inspection.