Source : Webster's Revised Unabridged Dictionary (1913)

Blacks \Blacks\, n. pl.
   1. The name of a kind of in used in copperplate printing,
      prepared from the charred husks of the grape, and residue
      of the wine press.

   2. Soot flying in the air. [Eng.]

   3. Black garments, etc. See {Black}, n., 4.