ᵂʰᵃᵗ ᶤˢ ˢᶜᶤᵉᶰᶜᵉ ??
ᴰᵒᶰᵗ ˢᵖᵃᵐ
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Bone char is a porous, black, granular material produced by charring animal bones. Its composition varies depending on how it is made; however, it consists mainly of tricalcium phosphate 57–80%, calcium carbonate 6–10% and carbon 7–10%. It is primarily used for filtration and decolorisation.
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