black spots
black spots, Total:2 items.
The international standard classification for "black spots" includes: Auxiliary materials and additives for plastics .
The Chinese standard classification for "black spots" includes: Basic standards and general methods for synthetic resin and plastic .
Professional Standard - Chemical Industry
- HG/T 4670-2014 Determination of black speck and impurity in flame retardant for plastic modification
PL-PKN
- PN BN 6093-02-1964 Black powder. Ignition black powder
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