... paper without the wax. They are available in all photographic sizes. Properties:Glassine envelopes are made from pure pine wood ... static, chlorine and acid free and does not contain chemical softeners.Envelopes do not have an adhesive seal, but come with ... Flap:Streaight flaps, V-shape flaps and rounded flaps are availableUsuage:These are ideal for the safe protection of stamps,blocks,sheetlets ...