Will a scanner show raised ink?

A flatbed scanner captures line detail and color well but tends to flatten texture. To show raised ink, scan plus take a side-lit photo or use oblique lighting during photography. Compare the scan with the angled photo to confirm raised lines or impressions.

Can I identify printing method without touching the stamp?

Yes. Use oblique light, a magnifier, and high-resolution images. Shadows from raised ink or impressions often appear under angled light, and magnification reveals edge quality and dot patterns. Avoid touching if the stamp is fragile or on a certificate of value.

What if a stamp shows mixed signs?

Some issues combine processes or were reprinted by a different method. Record every observed feature — impressions, dot patterns, and ink surface — and compare to specialist catalogues or reference images. Note the mixed signs in your identifier record and consult a specialist if value hinges on method.

How to Identify Stamp Printing Methods

This page shows practical, step-by-step ways to identify how a postage stamp was printed. Clear visual checks and simple tactile tests help collectors determine printing method and how that method can affect a stamp's condition and value.

Quick facts

Intaglio: raised ink lines
Lithography: flat ink surface

Why printing method matters

Printing method affects how a stamp looks, how it wears, and how specialists assign value. In philately, distinguishing methods helps you group issues, detect reprints or forgeries, and document condition. Knowing the method also guides storage: stamps with raised ink or deep impressions need gentler handling than flat-printed issues.

Quick visual and tactile checks

Start with the simplest tools: good light, a magnifier (10x), and your fingertip. Hold the stamp under oblique light and look for shadows at ink edges. Run a clean fingertip lightly across the design — do you feel texture? Use the magnifier to inspect edges of printed lines for hairline ridges or perfectly flat ink. A tactile test is low-risk: a very light touch can reveal raised ink without damaging the stamp. These basic checks let you quickly separate stamps with raised elements from those with a flat ink surface.

Comparing common methods

Two quick contrasts to memorize are Intaglio: raised ink lines and Lithography: flat ink surface. Intaglio plates press ink into deep lines; the result often leaves ink that stands proud of the paper so you can both see and feel fine raised lines. Lithography transfers ink in a way that keeps the printed layer essentially flat against the paper surface, producing a smooth, flat ink surface. Use the oblique light and fingertip checks above to tell these two apart at a glance.

Using a scanner and photography

Scanners can show fine line detail but usually flatten texture. If you use a scanner or a camera, do a high-resolution scan and then tilt a directed light source across the stamp while taking additional photos; those angled photos reveal shadows from raised ink and impressions. A dedicated flatbed scanner is useful for clear color and dot patterns; a macro-capable camera or smartphone with a macro lens is better for capturing tactile detail when combined with side lighting. Save scans and photos with a consistent filename that records the stamp and specimen number so you can compare images later.

Other methods and what to look for

Beyond intaglio and lithography, stamps can be produced by letterpress/typography, rotogravure/gravure, and offset processes. Typography often leaves a slight impression or crisp plate edge from a raised type form; gravure uses small cells that can produce continuous tone or very fine dot patterns; offset printing transfers ink from a plate to a rubber blanket then to paper, often yielding fine lines and color layering. When identifying, record the visual patterns you see: dot rows, plate lines, impressions, or perfectly smooth ink. Note those details on your identifier notes so you can compare similar issues or consult references.

Recording your identification and next steps

When you identify a printing method, write a brief record: stamp name, country, presumed method, which checks you used (tactile, oblique light, magnifier, scan), and one clear photo or scan. Keep these records with your collection. If you need a quick match from a scanned image you can upload, try using Stamp Identifier to compare your scan against reference images and confirm likely printing method and issue.

Common questions

Will a scanner show raised ink?: A flatbed scanner captures line detail and color well but tends to flatten texture. To show raised ink, scan plus take a side-lit photo or use oblique lighting during photography. Compare the scan with the angled photo to confirm raised lines or impressions.
Can I identify printing method without touching the stamp?: Yes. Use oblique light, a magnifier, and high-resolution images. Shadows from raised ink or impressions often appear under angled light, and magnification reveals edge quality and dot patterns. Avoid touching if the stamp is fragile or on a certificate of value.
What if a stamp shows mixed signs?: Some issues combine processes or were reprinted by a different method. Record every observed feature — impressions, dot patterns, and ink surface — and compare to specialist catalogues or reference images. Note the mixed signs in your identifier record and consult a specialist if value hinges on method.

← Stamp Identifier