Hot Stamping Foil Ghosting Problem on License Plates – Causes and Solutions
Problem Description
One of our customers experienced a common issue in license plate hot stamping: foil dragging, where the hot stamping foil leaves unwanted marks on non-stamped areas of the base film, affecting product appearance and quality.
Solutions
- Adjust Rubber Roller Gap and Pressure
Ensure the roller gap and pressure are properly set according to machine standards to avoid unintended foil contact.
- Recalibrate roller distance and pressure
- Standardize temperature, dwell time, and feed tension
- Perform first-article inspection before full production
- Ensure Plate Flatness
Prevent uneven contact caused by warped or non-flat license plates.
- Inspect and sort plates based on flatness
- Apply flattening processes if necessary
- Optimize fixtures or support to improve contact consistency
