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Stamps from different countries start with different glue on the back for adhesion to the envelope or parcel. Glue is not used to preserve stamps, but to glue them down. Collectors keep stamps on the envelope or place them dry in an album without hinges. These albums have rows of pockets to tuck your stamps into. Tweezers, not fingers, help keep the stamps undamaged. Valuable stamps are undamaged stamps.
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