Mercury and sulfur were mixed together, forming a black compound of sulphide of mercury, called Aethiopes mineralis. This was then heated in a flask. The compound vaporized, and recondensed in the top of the flask. The flask was broken, the vermilion was taken out, and it was ground. When first created the pigment was almost black, but as it was ground the red color appeared.
Hg + S -> HgS (Red+Black)
18 + 20 -> 38
Hg + S -> Salt + Azoth
Salt = 8
Azoth = 3
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