Kodak - A-1671

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Contents

Kodak A 1671 Use of KODAK Brown Toner to Extend the Life of Microfilm DOCUMENT IMAGING Introduction Microscopic Blemishes Some processed silver gelatin microfilms in storage from two to twenty years have developed microscopically small colored spots or blemishes The fogged leader at the outside of the roll is most frequently affected by the blemishes which are generally red or yellow in color and are smaller in size than the image characters for example a typewritten letter reduced 20X on the microfilm The spot size does not increase but the spots proliferate on the microfilm and can appear in image areas A more detailed description of the blemishes and of the techniques used in inspecting microfilm is given in National Bureau of Standards H ...