Bernini Duralong Cotton Envelope for Microfilms Natural White 90 grams 257×70 mm (pack of 100 pieces)

“Bernini” envelopes are made of 100% cotton Duralong Cotton paper, unbuffered, high purity, free of any chemicals. It is produced by a “round machine”; In this type of processing the paper is very porous and not pressed (calendered) to allow maximum air flow and to prevent the formation of potentially harmful gases. “Bernini” envelopes are ideal for storing the most delicate photographic materials such as films and microfiche.