Duplicated text in printed labels: causes and solution

I am printing labels and on some copies the small text appears slightly duplicated, while images and solid areas look normal. The file is always the same and at the beginning of the run the problem was not visible. I don't know if it depends on the file or the machine. What should I check?

By Cristiano Zappacosta — Senior Graphic Production Consultant

The problem

Cause and analysis

The progressive misalignment of toner on fine text could depend on a registration drift of the paper movement axes or printing elements, characteristic of toner-based digital printing when mechanical components begin to lose precision

The problem could stem from localized overheating of the drum or paper during the run, which causes slight expansion or movement of specific machine sections, more evident on fine text where registration tolerance is critical

Solution proposed by GPX

A progressive misalignment of the movement axes (Y or X axis of the paper) due to wear, accumulation of toner dust or mechanical play in guides and advancement rollers

Limitations of this analysis

This analysis is generated with the support of Artificial Intelligence: always verify its correctness and applicability before using it. The reliability level of this analysis is "Medium", not the highest possible.

Checks before proceeding

Perform a test run of at least 200-300 copies of the same file, noting the exact copy number at which the defect appears clearly and whether it worsens progressively or stabilizes — this data will guide the next verification step toward checking for mechanical issues (roller wear/play) or thermal issues (drum/fuser temperature)