Old fustic

Gelb-guss, m. yellow brass, -harz, n. yellow resin yellow rosin, -heit, /. yellowness, -holz, n. fustic, specif, old fustic 3 dlowwood. 

All dyes are prone to fading caused mainly by chemical oxidation when exposed to light. The formation of low molecular mass products has been evidenced, such as 2,4-dihydroxybenzoic acid and 2,4,6-trihydroxybenzoic acid from morin degradation, in old fustic dyed samples [169] and from luteolin in weld and dyer s broom [170],... 

Old fustic Quercitron bark Persian berries Clorophora tinctoria L. Quercus velutina L. Rhamnus family Luteolin + Apigenin Genistein... 

Figure 5. TLC of hydroxyflavone dyes. I, dyers rocket (Reseda luteola L., C.L Natural Yellow 2) 2, young fustic (Cotinus coggygria SCOP., C.I. Natural Brown 1) 3, buckthorn berries (Rhamnus cathartica L., fructi immaturi, C.I. Natural Yellow 13) 4, old fustic (Chlorophora tinctoria GAUD., C.I. Natural Yellow 1 5, osage orange wood (Maclura pomifera, C.L Natural Yellow 8) and 6, bastard hemp (Datisca cannabina L., C.L...

F. and flavonols are vacuolar pigments with a high absorption from 240 to 270 nm and 320 to 380 nm, i.e. they are yellow their frequent occurrence with anthocyanins leads to red and yellow flower colors. They used to be used in dying and printing, especially those from quercitron bark, old fustic (Chlorophora tinctorla L.), buckthorn berries and camomile. 

Colouring matter of old fustic (wood of Chlorophora tinctoria, Gaudich). Pale yellow needles + IH2O from dil. AcOH. M.p. 286-8° (sinters at 281°). Cone. H2SO4—> yellow sol. with bright bluish-green fluor. EtOH sol, + FeCL —> dark olive-green col. 

Old fustic from the heartwood of Chlorophora tinctoria (Moraceae) of central America and young fustic from Rhus cotinus (Anacardiaceae) were used in the middle of the 17th century to produce a range of light-stable olive-yellow to gold shades depending on the mordants. Similar colors were obtained with quercitron bark (Quercus discolor, Fagaceae) of the USA. 

Fustics f3s-tik n [ME fustyk smoke tree, fr. MF fustoc, fr, Arabic fustuq fr. Gk pistake pistachio tree] (15c) Yellow coloring matters of natural origin. Old fustic is obtained from the species, Morus tinctorial and consists of moric and morintannic acids. Young fustic is obtained from Rhus cotinus, and consists of fustic. 

Morin is 2-(2,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-l-benzopyran-4-one (also, 2, 3,4, 5,7-pentahydroxyflavone) it is a flavonoid (flavonol) compound and is the principal component of so-called old fustic , a dye derived from Madura tinctoria (L.) Steudel (Moraceae formerly Chlorophora tinctoria (L.) Gaud.) (Schweppe, 1992 Merck Index, 1996). Use of old fustic in pigments has been mentioned by Harley (1982). Morin is hsted in the Colour Index as Cl 75660/Natural YeUow 8 and 11. 

Yoimg fustic is a yellow flavonoid dyestuff derived from the plant Cotinus coggygria (formerly lUius cotinus L.) where the principal colouring matter is the flavonoid compound fisetin ( -v.) as well as fustiu. It should not be confused with old fustic, which is a yellow dye derived from Chlorophora tinctoria Gard. 

Madura spp. M. tinctoria (L.) Steudel Moraceae Old fustic Morin [Dihydromorin 5,7-Dihydroxy-6-C-prenyl-flavanone] Harley (1982) 104-105 Formerly Chlorophora tinctoria (L.) Gaud, and Moms tinctoria L. also mulberry ... 

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