Lint and/or broken filaments contaminate the fabric or heat press/calender by lying on the surface, which inhibits ink from gassing onto the fabric and causing a white spot.
Why Does Fasbric Contamination Occur?
Lint and/or broken filaments on the surface of fabric or heat presses/calender blanket is a common occurrence, especially if heat press/ calenders are in close proximity to cutting, sewing, or finishing equipment.
Though rare, fabric contamination can happen at mill stage.
Quick Fixes for Fabric Contamination
The best practice for removing lint and debris is to take a compressed air hose and blow the lint from the heat press/calender and fabric prior to transfer.
CONTAMINATION IS A COMMON PROBLEM AND CAN BE SOLVED BY USING AN AIR COMPRESSOR.