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
Glassine Envelope #5 Pkg 100 - iHobb
Amos Advantage - Glassine Envelope #4.5 - 3 1/8 x 5 1/16 (100-Pack)
100 Flat Glassine Paper A7 Envelopes Bags 5 1/2 x 7 3
Glassine Envelopes
Envelopes: Shop the Largest Selection of Styles, Sizes & Colors
Box of 1000 new, never-used JBM number 5 glassine envelopes. Size: 3 1/2 x 6. Manufactured from 30 lb. acid-free virgin glassine.
JBM #5 Glassine Envelopes 3 1/2 x 6 FREE U.S. SHIPPING Box of 1000
Natural A2 Envelopes, Square Flap, (4 3/8 x 5 3/4)
Glassine Envelope #5 Pkg 100 - iHobb
Glassine Envelopes
Natural Envelopes - No. 5 1/2 Baronial (4 3/8 x 5 3/4) 70 lb Text
Brilliant Translucent Square 5.5 x 5.5 Envelope