266 



REPORT — 1895. 



Wool Book VI. 

 Mordant Colours. 



Direct Cotton 26. Deltapurpurin 5B. From tolidine, /3-naphthylamine-8-sulphonic 

 Colours. acid, and )3-naphthylamine-sulphonic acid (;8 and 8). S. and 



J. 192. 

 „ 27. Deltapurpurin 7B. From tolidine and /8-naphthylamine-S-sul- 



phonic acid. S. and J. 200. 

 28. Congo Ked. From benzidine and naphthionicacid. S. and J. 163. 

 31. Benzopurpurin iB. From tolidine and naphthionic acid. S. and 



J. 189. 

 33. Benzopurpurin B. From tolidine and 0-naphthylamine-mono- 



sulphonic acid Br. S. and J. 191. 

 31. Direct Ked. From diamido-ethoxy-tolyl-phenyl and naphthionic 



acid. 

 38. Congo GK. Constitution not published. 

 42. Deltapurpurin G. From benzidine and /3-naphthylamine-mono- 



sulphonic acid (/3 and S), S. and J. 164. 



44. Congo 4R. From o-tolidine, naphthionic acid and resorcinol. 



45, Direct Red. From diamido-phenyl-tolyl and naphthionic acid. S. 

 and J. 184. 



Natural Colouring Matters. 



1. Ventilago madraspatana (root-bark) (Al.) (Sn.). 

 „ 2. Limawood (Al.) (Sn.). Wood of Caesalpinia echinata. 



„ 6. Camwood (Al.) (Sn.). 



„ 7. Barwood (Sn.). 



„ 8. Sanderswood (Sn.). 



Notes. — Fast Acid Magenta becomes uiuch bluer during the first 

 fading period, and assumes quite a purple colour, which gradually fades to 

 a purplish grey. Its behaviour is quite unlike that of ordinary Acid 

 Magenta, but very similar to that of Magenta itself, from which it is no 

 doubt derived. 



Emin Red is one of the more fugitive colours of this class, and might 

 almost be placed in Class I. 



Iso-Rubin R behaves like ordinary Magenta, and changes during the 

 first fading period to a purple, which soon fades still further. 



The colours given by Ventilago mad ra'ipatann,'Li\xmh^oodia,\\A Camwood, 

 with tin mordant, are all a little faster than with aluminium. The Cam- 

 wood, Barwood and Sanderswood colours with aluminium and tin mordants 

 all become brown and apparently darker during the first fading period ; 

 those obtained with tin mordant become much darker, and are somewhat 

 faster than the corresponding aluminium colours. This marked alteration 

 in hue during the early stages of the fading process is characteristic of 

 these dyestufis, and distinguishes them readily from Ventilago madra- 

 spatana and Limawood. 



Class III. Moderately Fast Colours. (Wool.) 



The colours of this class show distinct fading at the end of the second 

 period (July 14 to August 20, 1894), which becomes more pronounced at 

 the end of the third period (August 20 to September 22, 1894). A pale tint 

 only remains at the end of the fourth period (September 22, 1894, to 

 April 13, 1895), and at the end of a year's exposure the colour has en- 

 tirely faded, or, at most, mere traces of colour remain. 



Azo Colours. 

 Wool Book V. 



Acid Colours. 6. Azo Carmine BX. Sodium salt of phenyl-rosinduline-tri-sulphonic 

 acid. 

 „ 8. Crocein Scarlet lOB, Constitution not published. 



