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Stamp Glossary "I"A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Imperforate Stamps printed in sheets without perforation or other means of separation. Imperf Between Normal stamps that are perforated but with a line of perforations omitted between adjoining stamps or rows of stamps due to faulty manufacture. Impressed An imitation watermark impressed on the stamp by die stamping. Imprint Name of printer or issuing authority printed on the sheet margins, or on the stamps themselves. An accredidation of the firm which designed, engraved, and/or printed an essay, proof, or sheet of stamps. Appears in the marginal areas (margins) of the paper, away from the design. Imprinted Stamps Stamps other than adhesives, printed direct on postal stationery items (postcards, envelopes etc). India Paper - A thin, delicate bamboo based paper used for proving dies and plates. This paper is well suited for bringing out the finest details in an engraving. Tiny particles of bamboo and naturally occurring thins are characteristic of this paper. Intaglio Line engraving; the art of engraving a design in reverse in soft steel. Intaglio Printing The method by which a print is made from a design of recessed lines engraved in a die or plate. In printing an intaglio design, the die or plate is inked and then wiped clean. Ink remains in the engraved recesses. The paper and die (or plate) are then forced together under great pressure. When the pressure is released, the ink is literally sucked out of the recesses of the engraved metal and onto the paper. Intaglio prints have a characteristically raised surface of ink, often creating an uncanny three-dimensional appearance. Internet Auction A public sale at which stamps or covers are sold to the highest bidder. Bidding can be done in on-line by Internet. Payment has through credit card by Internet payment system. Invert The central design ('vignette') or portion of a stamp printed upside-down in relation to the frame, or vice versa. Ivory Paper A type of glazed white paper. |