Material Analysis
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PETG color migration during dyeing
Problem Phenomenon
The color of PETG products migrates to contacted objects (packaging paper, other plastics), causing contamination.
Cause Analysis
The dye or pigment used has poor migration resistance, residual low-molecular substances carry the color migration, and the processing temperature is insufficient to fully fix it.
Solution
Select migration-resistant pigments instead of dyes; increase the processing temperature for full dispersion and fixation; seal-coat the product surface.
Key Takeaway
PETG color migration is closely related to colorant selection.
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