Lamp-BLACK, or Lam-BLACK, the sooty smoke of rosin. There is some in powder and some in lumps, and is mostly brought from Sweden and Norway, and pays duty 11. 10s. 41/2d. the hundred weight. It is used on various occasions, particularly for making the printer's ink, for which purpose it is mixed with oil of walnuts, or linseed, and turpentine, all boiled together.