Frankfort
(ˈfræŋkfət)
The name of a German city. attrib. in Frankfort black, a fine black pigment used in copper-plate engraving.
| 1823 J. Badcock Dom. Amusem. 28 The black which is made by sublimation of pitch in dark chambers, and termed lamp-black and Frankfort black. 1853 Ure Dict. Arts, etc. I. 814 Frankfort black is..made by calcining vine-branches, and the other refuse lees of the vinegar vats, in Germany. |