Practical, source-backed guides for identifying, valuing, preserving, and organizing a collection.
Discover how to safely analyze screened dots and printing patterns on postage stamps. Learn why dot structures are cumulative clues rather than single tests, and how to combine visual evidence with production records.
Read articleDistinguishing between the four major stamp printing families requires a systematic approach. Learn how to combine visual clues under magnification to identify line-engraved intaglio, gravure, letterpress, and lithography safely.
Read articleIdentifying line-engraved intaglio postage stamps requires looking for cumulative clues like raised ink, debossing, and distinct line patterns. Learn how to safely analyze your stamps using non-contact magnification and oblique light.
Read articleIdentifying letterpress printing on postage stamps requires understanding relief methods. Learn how to distinguish letterpress from line-engraved intaglio, gravure, and lithography using non-contact magnification, oblique lighting, and production records.
Read articleModern postage stamps often combine multiple printing methods, such as line-engraved intaglio and offset lithography, on a single design. Learn how to safely identify these combined processes using cumulative visual clues, non-contact magnification, and oblique lighting.
Read articleOffset lithography is a widely used planographic printing process for postage stamps. Learn how to safely identify lithographic stamps by analyzing cumulative visual clues under magnification and comparing them with other major printing families.
Read articleCollectors often wonder how to tell intaglio (line-engraved) from gravure printing on stamps. This guide explains the key differences, safe identification steps, and why combining clues is essential for accuracy.
Read articleCollectors often ask how to identify the printing method used on a postage stamp. This guide compares the four broad families described by the American Philatelic Society: line-engraved intaglio, gravure, letterpress, and lithography. It uses safe visual inspection and treats every feature as supporting evidence rather than a stand-alone diagnosis.
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