Acorn Watermark (Oak Leaves and Acorns)
An upright oak twig with two leaves: a serrated leaf on the left and a smooth-edged leaf on the right. Two acorns appear on the left side of the stem and a gall on the r…
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Colour Varieties and Ink Errors
The colour and quality of the ink are fundamental to a stamp's appearance. Variations in ink composition, mixing, application or printing conditions can produce a wide r…
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Commemorative stamp
What is a commemorative stamp? Commemorative stamps are stamps, sets and souvenir sheets issued to mark particular events or anniversaries, promote exhibitions and othe…
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Definitive Stamp
A definitive stamp is issued primarily for the payment of ordinary postal rates and is normally printed as required rather than in a predetermined limited quantity.
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Double Print and Pseudo-Double Print
A double print and a pseudo-double print may look similar, but they are produced in different ways. A double print results from printing the stamp design twice on the sa…
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Engraved Printing
One of the oldest intaglio processes frequently used for stamp production is engraved printing, also known as line engraving.
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FDC (First Day Cover)
A First Day Cover is a specially designed cover issued at the same time as a new stamp and thematically related to the issue. It is generally abbreviated FDC, the standa…
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Flexography
Flexography is a modern form of relief printing named after its flexible printing plate. Modern photopolymer plates allow the process to reproduce fine detail and high-q…
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Foreign-Body Printing Flaw
In Hungarian printing jargon, the term poloska refers to a random printing flaw caused by a small foreign particle between the printing surface and the paper. It usually…
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II. Large Crown Watermark in Ellipses
II. Large Crown Watermark in Ellipses. A view of the Hungarian Crown from below, set within interlaced ellipses.
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III. Large Crown Watermark in Circles
III. Large Crown Watermark in Circles. A view of the Hungarian Crown from below, set within interlaced circles.
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