Material Analysis
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PETG product surface hardness test low
Problem Phenomenon
The pencil hardness test is lower than expected (below HB), easily scratched.
Cause Analysis
No surface hardening treatment after molding, the raw material grade itself is soft in hardness.
Solution
Use high-hardness PETG grades; treat the product surface with UV hard coating or silicon hard coating.
Key Takeaway
PETG surface hardness can be improved by coating.
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