Stamp printing methods are one of the most important — and most misunderstood — aspects of philately. The way a stamp is printed determines the texture of the ink, the sharpness of the design, and even the subtle three‑dimensional qualities of the paper surface. For many classic issues, identifying the printing method is essential for determining catalog number, rarity, and value. Three major printing processes dominate classic and modern philately: engraving (intaglio), letterpress (typography), and lithography. Each leaves distinct physical clues that collectors can learn to recognize with practice.[¹]
Engraved (intaglio) stamps are printed from recessed lines cut into a metal plate. When ink fills these grooves and is transferred under high pressure, it creates raised ink ridges that can be felt with a fingertip. Under magnification, engraved lines appear crisp, sharp, and slightly three‑dimensional. Shadows and fine details — such as hair strands, feathers, or shading lines — are characteristic of this method. Many of the world’s most admired stamps, including early U.S. issues and classic British Commonwealth definitives, were produced using engraving because of its security and aesthetic quality.[²]
Letterpress (typography) is the opposite of engraving: the raised parts of the plate carry the ink. When pressed onto the paper, the inked raised areas leave a slightly indented impression. Under magnification, typographed designs often show thicker, slightly uneven edges where ink has squeezed outward. Solid areas of color may appear slightly “blotchy” or less uniform than engraved work. Many early European and colonial issues — including numerous German States, Italian States, and early British colonial stamps — were printed typographically. The method was inexpensive and fast, making it ideal for large‑volume postal administrations.[³]
Lithography, by contrast, uses a flat printing surface where the image is created chemically rather than physically. Because no raised or recessed lines exist, lithographed stamps have no texture to the ink. Under magnification, the design often appears soft or grainy, and fine lines may look slightly blurred. Early lithographed stamps, such as the 1847–1850 issues of the Canton of Zürich or the 1850s issues of India, show clear examples of this softness. Modern lithography, especially offset lithography, can be extremely sharp, but it still lacks the raised ink of engraving or the impressed feel of typography.[⁴]
In the 20th century, additional methods emerged, including photogravure, which uses tiny ink‑holding cells etched into a cylinder. Under magnification, photogravure stamps show a distinctive dot pattern, similar to a newspaper photograph but more refined. Many British Machins, European commemoratives, and modern worldwide issues use photogravure because it allows high‑quality color reproduction at low cost. Identifying photogravure is essential for distinguishing between printings of certain issues, such as the multiple Machin varieties produced by different printers.[⁵]
For collectors, learning to identify printing methods is a foundational skill. A simple 10× loupe reveals most of the clues: raised ink for engraving, indented impressions for typography, soft edges for lithography, and dot patterns for photogravure. Specialized literature, such as the Stanley Gibbons Great Britain Concise Catalogue or the Scott Specialized Catalogue, often lists printing methods explicitly — but hands‑on examination is the best teacher. With practice, collectors can quickly distinguish methods and better understand the craftsmanship and technology behind the stamps they study.[⁶]
References
[¹] James Mackay, Philatelic Terms Illustrated, Stanley Gibbons Publications — entries on printing methods.
[²] Smithsonian National Postal Museum, “Intaglio Printing” — technical overview and examples.
[³] Robson Lowe, The Encyclopaedia of British Empire Postage Stamps, Vol. I–VI — extensive documentation of typographed issues.
[⁴] Royal Philatelic Society London, The Fundamentals of Philately by L.N. Williams — chapters on lithography and planographic printing.
[⁵] De La Rue Security Printers, technical notes on photogravure; also documented in the Stanley Gibbons Great Britain Concise Catalogue.
[⁶] Scott Specialized Catalogue of United States Stamps & Covers — introductory sections on printing methods and identification.