quercitronn.

1785 E. Bancroft Facts & Explan. 2 It was sold..and has been known under the Names of American Bark, or American Yellow Bark, and lately under the name of Quercitron Bark.

1792 Statute 32 Geo. III c. 39 in Statutes at Large (1794) 240 It shall and may be lawful for any Person or Persons whatever to import into Great Britain in British-built Ships, owned, navigated, and registered, according to Law, from any Country not in Europe, Quercitron or Black Oak Bark for the Purpose of dying.

1805 J. Sibley in Deb. Congr. U.S. (1852) II. App. 1113 The foliage of the hickory, and oak, which produces the quercitron bark, is changed before its fall into a beautiful yellow.

1823 A. Ure Dict. Chem. (ed. 2) 398/1 Cloth..subjected to the quercitron bath.

1832 D. J. Browne Sylva Americana 291 From the cellular integument of the black oak is obtained the quercitron, of which great use is made in dyeing wool, silk and paper hangings.

1852 C. Morfit Art of Tanning, Currying, & Leather-dressing (1853) 101 The quercitron, so much used in dyeing, is obtained from the cellular integument.

1901 Philos. Trans. (Royal Soc.) B. 194 522 Quercetin and fisetin, the colouring matters of quercitron bark and of young fustic.

1934 C. C. Steele Introd. Plant Biochem. vi. xix. 210 Quercitrin, a 3-rhamnoside of quercetin, occurs in the inner bark (‘quercitron bark’) of the Bark Oak (Quercus discolor or tinctoria), a native of America.

1994 A. Theroux Primary Colors 151 There was quercitron, a yellow lake made from the rasped inner bark of the black oak.

2001 L. Carlyle Artist's Assistant 520/1 Although yellow dye from quercitron bark was considered more durable, sources still referred to the use of the traditional dyes from turmeric and French berries.

1803 tr. A. Michaux in Med. Repository 6 69 Q. Tinctoria—var. sinuosa—quercitron-oak.

1843 J. Torrey Flora State N.Y. II. 188 Black Oak, Quercitron.

1885 C. S. Sargent Woods of U.S. 89 Quercitron Oak... The intensely bitter inner bark yields a valuable yellow dye, and is occasionally used medicinally in the form of decoctions..in the treatment of hemorrhage.

1924 Science 10 Oct. 339/2 (title) Quercitron oak and its relation to soils.

1976 Hortus Third (L. H. Bailey Hortorium) 935/2 [Quercus] velutina Lam. Black O., Yellow-barked O., Quercitron.

2007 M. D. Williams Identifying Trees 274 Black oak, Quercus velutina. Quercitron Oak, Yellow Oak, Yellow-Bark Oak.

1837 J. Rennie New Suppl. Pharmacopœias (ed. 4) 218 Quercitron lake..is a dark substance with a glossy fracture, used with gamboge and varnish, but spoiled by metallic colours.

1886 H. C. Standage Artists' Man. Pigments iv. 43 Yellow Lakes (Madder Yellow,..Quercitron Yellow or Lake).

1947 L. S. Pratt Chem. & Physics Org. Pigments vii. 65 Quercitron lake is a yellow coloring matter made from the inner bark of a species of oak, Quercus tinctoria, that is indigenous to North America.

2004 N. Eastaugh et al. Pigment Compend. 204/2 Heaton (1928) lists Italian pink as an obsolete or rarely used term for ‘a pure quercitron lake’.

1794 E. Bancroft Exper. Res. Philos. Permanent Colours 285 Without so far yellowing the cochineal crimson as to preclude the use of any of the Quercitron yellow in the dying of scarlet.

1886 H. C. Standage Artists' Man. Pigments iv. 43 Yellow Lakes (Madder Yellow,..Quercitron Yellow or Lake).

1981 Theatre Jrnl. 33 481 Colors in this category [sc. organic pigments] included..quercitron yellow, made from the bark of the American black-oak tree.

2009 S. Parissien Interiors 137/1 Bancroft's ‘quercitron yellow’ was at least easier and safer to obtain.