IDENTITY OF COAL-TAR COLORS, 1907. 



21 



>f 80 different chemical individuals, of which 73 are water-soluble and 

 are water-insoluble and are used as oil or fat colors. The remain- 

 ling third of the makers or dealers either do not possess the information 

 or are unwilling to give it. No attempt has yet been made to enter 

 systematically into this unknown region, but careful examination 

 warrants the belief that it can add nothing of material value to 

 the data already obtained which show a total of 23 shades for the 

 [73 water-soluble coal-tar colors, summarized as follows: 



Number of coal-tar colors. 



1 5 red shades 26 



1 4 yellow shades 14 



1 orange shade 7 



2 blue shades 7 



3 violet shades... 5 



3 green shades 6 



2 brown shades 5 



1 blue-black shade 1 



1 black shade 1 



1 blue to violet shade. . . 1 



The water-insoluble colors numbering 7 are not included, but will 

 be treated separately (p. 159). 



This view of the state of the United States market at or about the 

 middle of the year 1907 is without question a true reflection of that 

 market as far as it goes and the actual extent of the coal-tar color 

 market beyond those covered by this canvass of it is not likely to be 

 very great. In support of this view is the interchangeable treatment 

 of formerly patented products, the great lapse of time since a new food 

 color was discovered, and the fact that out of the 74 colors submitted 

 and contained in the Green Tables only 23 are now less than 25 years 

 old, and none is less than 16 years old. 



All the Green Table numbers and the number of sources out of a 

 possible 12 offering them are given in the following table: 



Number of sources, out of a possible 12, offering colors designated in 1907. 



Italicized figures Indicate colors permitted by F. I. D. 76. 



