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By certification 
PHYSICAL INDEX
1 Color Red orange yellow green purple brown black pink
2 Toxicity Non-toxic
3 Working temperature 1300℃
4 water solubility Insoluble in water
5 Specific Gravity 3.9g/cm3-4.1g/cm3
6 Mosh hardness 7.5-8.0
1 Color Red orange yellow green purple brown black pink
2 Toxicity Non-toxic
3 Working temperature 1300℃
4 water solubility Insoluble in water
5 Specific Gravity 3.9g/cm3-4.1g/cm3
6 Mosh hardness 7.5-8.0
