Butterfly Transfer Envelopes
Why glassine? Glassine is a smooth, translucent paper made from a manufacturing process called supercalendering. The paper pulp is beaten to break down the fibers. After pressing and drying, the paper web is passed through a stack of hard pressure rollers. This pressing of the paper fibers in the machine buffs the paper, producing a very smooth, enamel-like and acid-free surface. And the clarity of the glassine allows good visibility of the contents.