RES. U. S . MT. OFT.

6 C & E N NOV. 17, 1958

Bright, true colors made from dye Intermediates purified with

DARCO W h a t product, famous for purifying chemicals by removing color bodies, also helps keep colors bright and true . . . b y purifying a colorless chemical?

T h e answer, of course, i s D A R C O Acti­va ted Carbon. Seems tha t dye intermedi­ates, which may be colorless themselves, contain impurities that could cause false or muddy colors in the finished dye . Intermediate makers find that D A R C O does a first-class job of adsorbing these impurities, preventing unwanted side reactions. They like D A R C O ' S low prod­uct retention too, because they get high yield along with efficient purification.

I f you've got a purification problem, try adsorption with D A R C O . It has helped chemical manufacturers get rid of color bodies, odors, colloids, floc-precursors, causes of haze and foam, and other ad-sorbable impurities for over 40 years. We'll be glad to talk over your applica­t ion and show you how economically attractive DARCO purification is. Call or -write us today.

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