Method for improving the archival properties of a photographic film having a cellulose ester type support

摘要

The present invention has as its object a method for improving the conservation of a photographic product with a cellulose ester type support. This method consists of treating the said support or the said photographic product with a transparent film-forming aqueous composition. The said composition comprises a fibrous alumino-silicate polymer of formula AlxSiyOz in which x:y is between 1 and 3, and z is between 2 and 6. The method can be implemented in a number of ways. The said support can be treated before the application of the photographic layers (as a substratum or under-layer) or after the application of the photographic layers (as a top layer). It is also possible to treat an exposed, developed film by applying a top layer of the said composition.