Frankfortn.
/ˈfraŋkfət/, U.S. /ˈfræŋkfərt/ Frankfort black n. a fine black pigment used in copperplate engraving.
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the world > matter > colour > named colours > black or blackness > blackening agent > [noun] > pigment
blackOE
lamp-black1598
charcoal-black1622
ivory-black1634
blue-black1665
bone black1665
Indian ink1665
India ink1700
smoke-black1712
China-ink1782
Frankfort black1823
almond black1835
Spanish black1839
gas black1841
abaiser1849
peach black1852
vine-black1860
carbon black1872
drop-black1879
aspergillin1891
1823 J. Badcock Domest. Amusem. 28 The black which is made by sublimation of pitch in dark chambers, and termed lamp-black and Frankfort black.
1853 A. Ure Dict. Arts (ed. 4) I. 814 Frankfort black is..made by calcining vine-branches, and the other refuse lees of the vinegar vats, in Germany.
This entry has not yet been fully updated (first published 1897; most recently modified version published online March 2022).
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n.1823