The emulsion side of this film is matte, while the non-emulsion surface is glossy. Diazo film is available in a variety of colors, including black. It may have an acetate or polyester base. Processed black diazo resembles silver-gelatin film but is glossy on both sides. Diazo film is reasonable stable, but eventually fades, even in the dark.
Vesicular film is made of diazo emulsion sandwiched between two polyester base layers.
Rubber bands should be removed from reels of microfilm. If a film unravels, use acid-free paper to wrap around. Always use plastic reels instead of metal to avoid rust corrosion, and store in acid-ress boxes. The fiche should be sleeved with the emulsion side away from the interior edges of the enclosure to prevent abrasion. Steel filing cabinets are preferable for microform storage.