THE INDIGENOUS DYES OF BENGAL. 



167 



Table IV. — Fastness to Acid of Dyeings on Silk. 







Intensity and tint after 







. 



Fulness of 



treatment with acid, 



Colour of acid bath 





Dyeing. 



shade 



washi 

 (Origin 



ng and drying, 

 al Intensity - I.) 



afterwards. 



Group. 



Turmeric, raised with, acid 



full 



I., tint unaltered 



medium yellow 



Ill 



, , alum mordant 



full 



I., 



ditto 



light yellow 



III— IV 



Kusum 



full 



L, 



ditto 



colourless 



IV 



Bakam, alum mordant 



medium 



<il. 



, ditto 



light yellow 



I 



,, alum-soda mordant 



full 



<*I; 



, ditto 



medium orange 



I 



, , tannin-iron mordant 



full 



L, tint almost un- 



light yellow 



III— IV 









changed 







Palas, without mordant 



light 



>*I. 



, tint unaltered 



almost colourless 



IV 



, , alum mordant 



medium 



il., 



ditto 



almost colourless 



II 



Latkan, Murshidabad process 



full 



I., 



ditto 



colourless 



IV 



,, Nadia process 



full 



I., 



ditto 



colourless 



IV 



Manjista, alum-soda mordant 



medium 



>hl. 



, ditto 



colourless 



\ 



, , ditto 



full 



L, 



ditto 



colourless 



j 



,, ditto followed by soap- 











Y iv 



ing and raising 



medium 



>il. 



, ditto 



colourless 





,, ditto ditto 



full 



I., 



ditto 



colourless 



j 



Lac, alum mordant 



medium 



I., 



ditto 



colourless 



IV 



,, alum-soda mordant 



full 



I., 



ditto 



light orange 



III— IV 



Kamala, without mordant 



full 



I., 



ditto 



colourless 



"1 



, , alum mordant 



full 



>il. 



ditto 



colourless 



I IV 



ditto* .. 



full 



11., 



ditto 



colourless 



J 



Singhar, without mordant 



full 



>il.= 



ditto 



med.-full yellow 



I III 



,, alum mordant 



full 



>*I., 



ditto 



med.-full yellow 



Jackwood, alum mordant 



med.-full 



>iL, 



ditto 



almost colourless 



IV 



Orange II., 3% 





I-, 



ditto 



medium orange 



III 



Naphthole Yellow S. , 0-5% 





I., 



ditto 



colourless 



1 " 



4% 





L, 



ditto 



colourless 



Metanil Yellow E. , 1% 





L, 



ditto 



colourless 



!" 



oO/ 





I, 



ditto 



colourless 



,, >> 5 A) 





I., 



ditto 



colourless 



Scarlet RRR., 3% 





I., 



ditto 



colourless 



IV 



Fast Pink, 5% 





L, 



ditto 



colourless 



IV 



Auramine II., 3% 





<il. 



ditto 



full yellow 



1 



Magenta, 013% 





*L, 



ditto 



med.-full magenta 



1 > 



1% 





*I., 



ditto 



full magenta 



Safranin, o'4% 





IL, 



ditto 



medium pink 



} I 



4% 





il., 



ditto 



full red 



Chrysophenine BB., 3% 





L, 



ditto 



colourless 



} - 



6°/ 



, » U /O 





I., 



ditto 



colourless 



Primuline, 2% 





L, 



ditto 



colourless 



IV 



Thiazine Red R., 5% 





L, 



ditto 



colourless 



IV 



Primuline 8% treated with Soda . . 





I., 



ditto 



colourless 



IV 



,, 8% developed with Phenol 





I., 



ditto 



colourless 



IV 



,, 8% developed with 













p Napthol 





I., 



ditto 



colourless 



IV 



Alizarine (Hurst, loc. cit., 31 













appendix) 





I., 



ditto 



colourless 



IV 



The whole sample was exposed to sunlight for two days before the tests were started. 



