I 



PIGMENTS 1097 PIGMENTS 



CONSPECTUS OF PIGMENTS.— Continued. 



Composition, Preparation, Etc. 



Color. 



Galloflavin. 



Gambier (gambir, pale catechu, terra 

 japonica). 



Gamboge. 



Garanceux. 



Garancin. 



Gas-black (hydrocarbon-black). 

 Glaucotin. 



Guaiac-vellow. 



Harmal-red (Harmalin). 



Hemateln. 



Hematoxylin. 



Hooker's green. 



Ilixanthin. 



Indigo (Indian blue). 



Indigo-brown. 



Indigo-carmin. 



Indigo-extract (disulphonic acid, inttigotin). 



Indigo-red (indigo-purple, indirubin). 



Indigotin (Indigo-blue, liquid blue, Saxony 

 blue, oat-blue). 



Indigo-white (indigogen). 



Isatrin-yellow. 



Japan black (asphaltum, Brunswick black, 

 Japan lacquer). 



Kyanophyl. 



Lamp-black (soot ). 

 Ligulin. 



Lithospermum-red. 



Litmt 



Logwood-black. 



Decomposition of Indican by oxalic or tartaric acid. ; Reddish-purple. 



A pigment known to the ancients, and obtained from 

 many plants, Indigo/era tinctoria, L. ; Indigo/era 

 anil, L. ; Indigo/era argentea, L. ; Indigo/era dis- 

 perma, L. ; Isatis tinctoria, Isatis lusitanica (see 

 IVoad. ), JVerium tinctorium, or Wrightia tinctoria. 

 Polygonum tinciorium, Polygonumfagopyrum, Poly- 

 gonum chmense, Marsdenia tinctoria, Asclepias 

 tingens, Galega tinctoria, Mercurialis perennis, 

 Melampyrum arventz, Melampyrum crisiatum, 

 Polygola bracteolata, Croton tinctorium, Croton ver- 

 bascifolium, Phytolacca decandra, Phytolacca mexi- 

 cana, Monotropa hypopitys, Tephrosia apollinea, 

 T. toxicaria, Randia aculeata,Amorphafruticosa; 

 also found in animal fluids, urine, sweat, milk, pus. 

 This pigment is not a direct product of the plant- 

 juices or animal fluids, but a decomposition-product, 

 the result of the action of bacteria upon indican or 

 other glucosids. Cf. Bacillus indigoferus, Classen, 

 and Bacillus indigogenus, Alvarez, under Bacteria, 

 Synonymatic Table of. 



Blue. 



Action of reducing agents on commercial indigo. 



Blue. 



Action of phenylhydrazinparasulphonic acid on dioxi- 

 tartaric acid. 



Yellow. 



Cooking asphaltum with linseed-oil and adding tur- Black, 

 pentine. 



Wiesner's name for nearly pure chlorophyl freed from Blue-green, 

 its yellow pigment, xanthophyl. Cf. Phyllocyanin. 



Imperfect combustion of resin, oils, gas, tar, etc. 



Black. 



Obtained by Xickles and Reinsch from the berries of. Carmin-red. 

 Ligustrum vulgare. Cf. CEpholin. 



First obtained by Ludwig and Kromayer from the Red. 

 bark of the root of Lithospermum arvense. 



From Roccella tinctoria, and other lichens. 



Blue. 



Mordanting with iron salts and dyeing with log- Black, 

 wood. 



