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ANSI IT9.1

ANS T91 1996-JAN-01 magng Materals - Processed Slver- Gelatn Type Black- and-Whte Flm - Specfcatons for Stablty

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This International Standard establishes the specifications for photographic films intended for the storage of records.

It applies specifically to films with a base of safety cellulose ester or polyester [poly(ethylene terephthalate)] having silver-gelatin emulsions, processed to produce a black-and-white silver image by negative or full-reversal processing. It applies to film processed by a monobath which includes thiosulfate as the fixing agent followed by a conventional wash. It also applies to silver films given a stablizing treatment by partial or full conversion to silver sulfide, silver selenide or gold.

This International Standard does not apply to films with colour images of any type, nor to films with a magnetic recording track. It does not apply to films with silver images produced by dry or thermal processing, or by diffusion- reversal processing. It does not apply to films that have been processed by a monobath using other than a thiosulfate-type fixing solution. It is not applicable to films where the silver salts are removed by means other than thiosulfate solutions [Footnote 10].

This International Standard does not apply to films to which lacquers have been applied.

This International Standard applies to films having ultrasonic or dielectric (induction heated) splices. It does not cover films with splices made by means of adhesive tape or solvent-type splices. (Footnote 1)

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