Store your duplicate stamps in semi-transparent glassine envelopes, similar to what is used by the U.S. Post Office for stamps purchased at the their
Brilliant Green 60# A10 Envelope
Glassine Envelopes 100/pack
One Hundred 100 #4 Glassine Envelopes -- 3 1/4 x 4 7/8
Glassine Envelopes
Cougar Opaque White Vellum 70# 5 Bar Envelope
Glassine Envelope - Lynn Peavey Company
Brilliant Translucent Square 5.5 x 5.5 Envelope
Smead Poly Envelopes Letter Size Side Opening Assorted Colors Pack
Amos Advantage - Glassine Envelope #4.5 - 3 1/8 x 5 1/16 (100-Pack)
One Hundred 100 #4 Glassine Envelopes -- 3 1/4 x 4 7/8
JAM A10 Translucent Envelopes, 6x9.5, Purple, 50/Pack, Wisteria
Amos Advantage - Glassine Envelope #5 - 3.5 x 6 (100-Pack)
6 Catalog 7.5x10.5 Envelopes - 24# WHITE WOVE (7-1/2 x 10-1/2
Bundle of 100 new, never-used JBM number 5 glassine envelopes. Size: 3 1/2 x 6. Manufactured from 30 lb. acid-free virgin glassine.
100 QUALITY JBM #5 Glassine Envelopes 3 1/2 x 6 V-Flap Made in USA