2]2 



These dy^es may be used also to intensify flowers having a pale 

 color, as of pale-yellow carnation, pink rose, etc. In some 

 cases the natural colors can be modified, as in the production 

 of a yellowish-red flower of snapdragon from a yellow flower. 

 In the accompanying table the following data are given : 



1. The colors produced in white flowers when the stems are 

 placed in aqueous solutions of the dyes. 



2. The common names of the dyes. 



3. The composition of the dyes. 



4. The colors of the dyes or mixtures used. 



5. Colors of the aqueous solutions. 



Color Produced 



Common Name 





Color of Dye or 



Color of Aqueous 



in 



of Dye. 



Composition of Dye. 



Mixture. 



Solution. 



White Flowers. 











Canary yel- 



Acid Yellow 



Sodium salt of disulpho- 



Bright orange- 



Golden-yel- 



low. 



A. T.(C). 



diphenylazin-dioxytar- 

 taric acid. 



yellow. 



low. 



Orange. 



Orange G. 



Sodium salt of benzene- 



Yellowish- or 



Brownish- 





G. (C). 



azo-H-naphthol-disul- 

 plionic acid. 



carmine-red. 



red. 



Blue. 



Cyanole F. 



Sodium salt of metaoxy- 



Dark-blue. 



Deep pur- 





F. (C). 



diethyl-diamidophenyl- 

 ditolyl-carbinol-disul- 

 phonic acid. 





plish-blue. 



Green. 





A mixture of equal parts 

 of Acid Yellow A. T. 

 and Cyanole F. F. 



Deep bluish- 

 gray. 



Dark-green. 



Purplish-red 



Acid Magenta 



Sodium salt of the tri- 



Deep-brown. 



Purplish-red. 



or magenta. 



(C). 



sulphonic acid of ro- 

 saniline. 







Crimson. 





A mixture of equal parts 

 of Acid Yellow A. T. 

 and Acid Magenta. 



Yellowish- 

 brown. 



Oimson. 



Purple. 





A mixture of equal parts 

 of Cyanole F. ¥. and 

 Acid Magenta. 



Grayish-blue. 



Purple. 



Salmon-pink. 



Brilliant Cro- 



.Sodium salt of benzene- 



Brick-red. 



Light-crim- 





ceine M. 



azo-bcnzene-azo H- 





son. 





0. 0. (C). 



naphthol-disul phonic 

 acid. 







Pale salmon- 



Crystal Scar- 



Sodium salt of a naphly- 



Reddish- 



Rose-red. 



pink. 



let6R.(C). 



lamine-azo- H-napthol 

 disulphonic acid. 



brown crys- 

 tals with 

 golden re- 

 flect. 





Dark gray or 



Naphtol 



Sodium salt of di.sulpho- 



Bluish-black. 



Deep violet. 



blackish. 



Black B. 



(C). 



B-naphlhalene-azo-A- 

 naphthalcne-azo-B- 

 naphtol-disulphonic 

 acid. 







