OCR Text |
Show Natural dyes, mado mostly from vegetables, veg-etables, plants and wood, woro practically prac-tically tha only dyes known for centuries. cen-turies. Their gradual dlsuso in the-last the-last hundred years has been duo to tho discovery that dyes could be mado from coal tar. Largely through the experiments ot European chemists, coal tar dyes were made so satisfactory satisfac-tory a substitute for tho natural dyes that tho business In artificial article soon took on enormous proportions. Llttlo attempt was made In America to manufacture coal tar dyes because tho Europeans possessed patents which practically gavo them control ot tho trade. Germany has long controlled con-trolled tho world'" trade In this business. busi-ness. Ono reason tor the popularity of artificial dyes has been tho wide rango of brilliant colors in which they could be had. |