Effect of silica gel addition on cotton dyeing with Sirius dyestuff

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The dyeing properties of cotton with direct dyes are influenced by the addition of auxiliary reagents such as neutral salts. The effects of silica gel addition on cotton dyeing with Sirius dyestuffs were investigated. L a b values as color difference of dyed cloths were measured on a color difference meter.Up to 10％ o.w.f. addition of silica gel into the dyebath, L values were decreased, and above 15％ addition L values were increased. In an occasion of coexistence of silica gel particles and neutral salt, the effects of silica gel addition were not observed so cleary. The addition of silica gel particles in the dyeing with Sirius Black L having greater minus charge was more effective than that in the dyeing with Sirius Red 4B.The adsorption of these dyestuff on silica gel particles filtered from dyebath was not observed, and neither was the weight, increase of dyed cloth.
長野県短期大学の論文