Information from the Getty AAT
king's yellow (pigment)
Synthetic arsenic trisulfide, made since the 18th century and valued because it is purer and less expensive than its natural counterpart, opriment.
History of technique in the arts, 1500-1950
History of technique in the arts, 1500-1950
Synthetic arsenic trisulfide, made since the 18th century and valued because it is purer and less expensive than its natural counterpart, opriment.