NGAI

NGAI is No Gum As Issued.

Tropical regions with high humidity present a storage problem for mint stamps with the usual type of gum arabic-based gum. So stamps are supplied without gum so a postal clerk or mailer uses mucilage or paste to attach stamps to letters and packages.

For the collector, this can create a challenge to remove dried glue from used stamps. It may be best to just leave stamps on their backing paper.





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