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TITLE(s): COLOR MAKER (chemical) Controls equipment to make dyes from coal tar derivatives: Measures coal tar derivatives, using balance scale or graduated container, dumps them and required amounts of sodium salt of nitrous acid with hydrochloric acid into vat of water, and starts agitator to make chromogen (dye-forming substance). Adds ice to chromogen to maintain temperature at prescribed level. Dips litmus paper into chromogen to determine its acidity. Adds required amounts of auxochromes (salt-forming materials) to chromogen to strike (form) dye. Tests acidity of dye, using pH meter, and corrects variances from standard by adding specified acid or alkali to dye. GOE: 06.02.11 STRENGTH: M GED: R3 M2 L2 SVP: 5 DLU: 77 ONET CROSSWALK: 92965 Crushing, Grinding, Mixing, and Blending Machine Operators and Tenders | |||||||||||||||||||||||||||||||||||
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