Glossary of Philatelic Terms I
Click on a letter to see the terms beginning with that letter
Imperforate: Refers to stamps without perforations or rouletting between the individual stamps in a pane.
Impression: Any stamped or embossed printing.
Imprimatur: Latin for "let it be printed.'' The first sheets of stamps from an approved plate, normally checked and retained in a file prior to a final directive to begin stamp production from a plate.
India paper: A thin, tough opaque printing paper of high quality used primarily for striking die proofs.
Inscription: The letters, words and numbers that are part of a postage stamp design.
Invert: The term generally used to describe any error where one portion of the design is inverted in relation to the other portion(s).
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