THE INDIGENOUS DYES OF BENGAL. 37 



Table II. — Fastness to Soaping of Dyeings on Cotton. 



Dyeing. 



Fulness of 

 shade. 



Appearance after soaping, 

 washing and drying. 



Group. 



Turmeric with acid 



full 



great change of colour 



I I 



, , with alum 



full 



ditto 



Kusum 



light 





) 



?3 • • 



medium 





■ 



?> ■ • 



full 



much lighter 



) 



Bakam (Tannin- tin mordant) 



full 



considerably lighter 



II 



,, (Tannin- iron mordant) 



full 



no change 



IV 



Palas without mordant 



light 



almost completely washed out 



I ' 



, , with alum 



medium 



almost completely washed out 



Latkan (Murshidabad process) 



medium 



slightly lighter 



1 Tir 



,, (Nadia process) 



medium-full 



slightly lighter 



jlll 



Manjista without mordant 



light 





s 



,, (alumina mordant) 



medium-full 



no change 



IV. 



, , (Turkey- red mordant) 



medium 



no change 



) 



Catechu 



light 



no change 



}!V 



• > • • 



medium 



no change 



Red Sandal 



medium 



slightly colder shade 



III 



Padauk 



medium 



slightly colder shade 



III 



Eosin (sodium stannate mordant) 



light 



considerably lighter 



II 



Congo Red, 0*04% 



light 





> 



,, 0-17% 



medium 







„ 0-35% 



medium 





.IV 



1 



» 175% 



full 



no change 



1 

 J 



Primuline (5% developed p Naphthol) 



full 



no change 



IV* 



>> (5% developed Resorcin) 



full 



no change 



IV* 



Magenta o - 02% 



light 







i-o% 



full 



no change 



I IV* 



Safranine 0'i% 



light 







3-4% 



full 



no change 



j IV* 



Primuline (5% developed Phenol) 



full 



no change 



IV* 



Alizarine (alumina mordant) 



light 



considerably lighter 



II 



(Turkey-red ) 



light 



no change 



} IV 



" )> >) ) 



full 



no change 



* Results agree with observations of Messrs. Cassella & Co. (loc. cit.). 



