Glassine Butterfly Transfer Envelopes Size #3
(4 1/4" x 2 1/2")
Glassine envelopes made from transparent virgin 30# glassine, side seams with ungummed top flap
The #3 Glassine Envelope is ideal for use when collecting, storing or shipping medium-sized butterflies like Gulf Fritillaries or Mourning Cloaks
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 direction buffs the paper, producing a very smooth, enamel-like and acid-free surface. And the clarity of the glassine allow good visibility of the contents.