Production & Quality
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PETG product yellowing after long-term light exposure
Problem Phenomenon
The product color yellows under long-term light exposure, and appearance quality declines.
Cause Analysis
Ultraviolet and short-wave components of visible light cause photo-oxidative degradation, lacking light stabilizer protection.
Solution
Add UV absorber and HALS; UV protective coating; avoid long-term direct sunlight.
Key Takeaway
PETG light stability needs to be enhanced by additives or coatings.
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