The oil stain is poured on the box, and after an hour and a half, it is still not penetrated on the surface of the box, and it can be wiped with a paper towel
Eco-friendly board - gray
Eco-friendly board - blue
Eco-friendly board - dark gray
Eco-friendly board - yellow
Protect from light
Step 1: Raw material extraction
Step 2: Grind into calcium carbonate splits
Step 3: Add graphene and other materials
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