ON THE ACTION OF LIGHT UPON DYED COLOURS. 



271 



Notes. — The fastness to light of all the azoxy colours here mentioned 

 is so good that they might be almost equally well placed among the 'very 

 fast ' colours. 



The Direct Orange 'IR here referred to is quite distinct from the 

 colouring matter of the same name mentioned in last year's Report, and 

 there classed as a ' very fugitive ' colour. 



Cresotin Yellow R and Diamine Yellow N were exposed last year, 

 applied as acid-colours. Here, where they are applied on chromium 

 mordant, they appear to be little or no faster to light ; applied on 

 aluminium and tin mordants they are distinctly more fugitive. 



Class V. Very Fast. (Wool.) 



The colours of this class show a very gradual fading during the different 

 periods, and even after a year's exposure a moderately good colour remains. 



Wool Book vir. 

 Direct Cotton 

 Colours. 



10. 

 11. 

 13. 



14. 

 15. 

 16. 

 17. 



Azoxy Colours. 



Mikado Gold Yellow 2G. Constitution not published. 



Mikado Yellow, Constitution not published. 



Direct Yellow G. Sodium salt of di-nitroso-stilbene-disul- 



phonic-acid. 

 Diamine F:ist Yellow A. Constitution not published. 

 Mikado Gold Yellow 4G. Constitution not published. 

 Mikado Gold Yellow 6G. Constitution not published. 

 Direct Yellow 3G. Oxidation product of Direct Yellow G. 



Wool Book VII. 



Direct Cotton 



Colours. 



Azo Colours. 



0. Terra Cotta K. From aniline and salicylic acid (nitrated). 

 12. Diamine Gold. From di-amido-naphthalene-disul phonic acid 

 (1 : 5 : .S : 7) and phenol (ethylated). 



5. Hessian Yellow (Cr.). From diamido-stilbene-disulphonic acid 



and salicylic acid. S. and J. 154. 



6. Chrysamine E (Cr.). From o-tolidine and salicylic acid. S. 



and J. li).-,. 



7. Chrysamine G (Cr.). From benzidine and salicylic acid. S. and 



J. 166. 



8. Cresotin Yellow G (Cr.). From benzidine and o-cresol-car- 



boxylic acid. 

 11. Carbazol Yellow (Cr.). From diamido-carbazol and salicylic 

 acid. S. and J. 131. 



Wool Book Vlir. 

 Mordant Colours. 



Mordant Colours. 



Oxyhetone Colours. 



Purpurin (Al.) (Sn.). 

 Alizarin (Al.) (Sn.). 

 Anthrapurpurin (Sn.). 

 Flavopurpurin (Sn.). 

 Alizarin S (Al.) (Sn.). 



6. Alizarin SS (Al.) (Sn.). 



7. Alizarin SSS(A1.) (Sn.), 



Sulphonic acid of alizarin. 

 Sulphonic acid of anthrapurpurin. 

 Sulphonic acid of flavopurpurin. 



Natural Colouring Matters. 



1. Sophora japonica (Cr.) (Sn.), 



3. Munjeet (Sn.). 



4. Morinda-root (Sn.). 

 .5. Madder (Sn.). 



5. Chay-root (Sn.). 



