A linen tester is a small magnifying glass in reproduction and printing technology with 8 to 10x magnification. Linen testers are often used in pre-press to check halftone or register accuracy.
The linen tester is therefore a magnifying glass that is primarily used to visualise fine details in the printed image. It is used in print control and error analysis to detect irregularities such as:
- Point structure (grid points) and their quality,
- Colour gradients and their even distribution,
- Distortion or loss of detail (e.g. in small fonts),
to check.
The linen tester was invented to check the quality of fabrics. It is still used today in the textile industry to measure the number of weft and warp threads in a specific area of the fabric.
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Proof.de is featured twice in the “Fogra Aktuell” magazine
In the current issue of Fogra News “Fogra Aktuell” Proof GmbH is involved in two places. Firstly, a summary of the Fogra report on our first FOGRA55 certification for seven-colour printing with extended colour space in CMYKOGV appeared. You can also find more information on our FOGRA55 certification on the Fogra website: https://fogra.org/en/press-releases/fogracert-erste-cpc-zertifizierung-fuer-fogra55-cmykogv-330 and on proofing.de: And secondly, there was a report on the completion of the research project for textile digital printing, FOGRA58, in which we were allowed to investigate and test the proof capability of the new textile … read more
RGB colour spaces explained
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Current Proof Standards 2025
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Cross-media colour management really works
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We passed the first proof certification for the 7C proof under FOGRA55
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Colour deviations in 2023 PANTONE Color Bridge Guides
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Proof GmbH 2021 Certified Again by Fogra with Fogra “Spot cert”
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