Black Copper Oxide

We are offering Black Copper Oxide.
specifications
black powder
copper oxide 98%min
ceramics grade/electroolating of electricity plate/stainer for glass,ceramic,porcelain
copper oxide black
1.electroplating grade
cuo----------98.5%min
zn------------200ppm max
fe------------100ppm max
pb------------60ppm max
cl-------------100ppm max
acid-insoluble ------0.01% max
2.electronic grade
cuo----------98%min
hydrochloric acid insoluble-----------0.2%max
water soluble matter---------------0.1%max
cl-------------0.2%max
so-------------0.2%max
cd-------------5ppm max
pb-------------100ppm max
hg------------2ppm max
cr vi---------2ppm max
3,industrial grade
cuo----------98%min
so-----------0.2% max
cl------------0.2%max
water soluble matter------------0.1%max
hydrochloric acid insoluble-----------0.2%max
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