38 



MR. E. R. WATSON ON 

 Table III. — Fastness to Alkali of Dyeings on Cotton. 



Dyeing. 



• 



Fulness of 

 shade. 



■ 



Appearance after 



treatment with 



alkali, washing and 



drying. 



Colour of alkaline bath 

 afterwards. 



Group. 



Turmeric with acid 



full 



great change of colour 



light yellow 



! ' 



,, with alum 



full 



great change of colour 



light yellow 



Kusum 



light 







\ 



>> • • 



medium 







[ 1 



J! - ' 



full 



much lighter 



full orange 



' 



Bakam (Tannin-tin mordant) 



full 



considerably lighter 



full red 



11 



,, (Tannin-iron mordant) 



full 



no change 



medium brown-red 



in 



Palas without mordant 



light 



changed to vy light pink 



medium yellow 



} ' 



,, with alum 



medium 



changed tow light pink 



full yellow 



Latkan (Murshidabad process) 



medium 



no change 



full yellow 



}m 



,, (Nadia process) 



medium-full 



no change 





Manjista without mordant 



light 



no change 



very light red 



) 



,, (alumina mordant) 



medium-full 



no change 



light red 



> III— IV 



,, (Turkey- red mordant) . . 



medium 



no change 



no colour 



) 



Catechu 



light 



no change 



no colour 



}xv 



>j 



medium 



no change 





Red Sandal 



medium 



slightly colder shade 



medium brown 



III 



Padauk 



medium 



slightly colder shade 



med. greenish brown 



III 



Eosin (sodium stannate mordant) 



light 



considerably lighter 



very light pink 



II 



Congo- red 004% 



light 







-\ 



„ 0-17% 



medium 



. 







.. 0-35% 



medium 







.IV 



,, » 175% 



full 



no change 



no colour 



J 



Primuline (5% developed 

 /? Napthol) 



full 



no change 



no colour 



IV* 



Primuline (5% developed Resorcin) 



full 



no change 



no colour 



rv* 



Magenta 0-02% 



light 







| in* 



i-o% 



full 



no change 



light green 



Safranine o*i% 



light 







| in* 



„ 3-4% 



full 



no change 



medium red 



Primuline (5% developed Phenol) 



full 



no change 



no colour 



IV* 



Alizarine (alumina mordant) 



light 









,. (Turkey-red ,, J 



( „ ) •• 



light 



full 



no change 

 no change 



no colour 

 no colour 



}lV 



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



