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a-pen

Annealed polyethylenenaphthalate-a polyester material used as the base on Advanced Photo System film;thinner, stronger and flatter than the acetate base traditionally used in consumerphotographic roll films.

mirglossary

a-pen

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Foto-Magazin

a-pen

The base for APS film emulsions. Its a strong material that it accepts film emulsions evenly and, with a thickness of just 90 microns its 30% thinner than the acetate base used in conventional 35mm emulsions.
ephotozine