A horizontal line traced across a cathode-ray tube by an electron beam to form part of an image. Typically, this issue is caused by wet ink or some other substance transferred from a piece of paper as it goes through the scanner. The ink or other substance gets on the glass as the paper moves through, and blocks the light of the scanner in that area for future copies.
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A horizontal line traced across a cathode-ray tube by an electron beam to form part of an image. Typically, this issue is caused by wet ink or some other substance transferred from a piece of paper as it goes through the scanner. The ink or other substance gets on the glass as the paper moves through, and blocks the light of the scanner in that area for future copies.
Cite this term
Election Security Glossary. (2026). Scan Line. In Election Security Glossary. Retrieved August 21, 2026, from https://electionsecurityglossary.com/glossary/scan-line
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