Abstract
This study was designed to measure the effect of detergency and the redeposition of tetrachloroethylene (perchlorethylene CCl2 : CCl2) upon various dyes in cleaning.
The results are as follows :
1. Fabrics dyed with water-soluble dyes-
The degree of redeposition was observed to have increased when the dyed fabrics were treated in the solvent with added moisture, while ΔE of dyed fabrics remained in the same value. In the 1 % water charge system, the degree of redeposition became higher and ΔE of the dyed fabrics increased.
2. Fabrics dyed with water-insoluble dyes-
The dyes on the fabrics dissolved into the solvent to a certain degree, and the transmittance of the solution was lowered. The white fabric absorbed the soiled solution. In the water charge system the redeposition was checked to a certain extent.
3. Fabrics dyed with oil-soluble dyes-
The oil-soluble dye was easily dissolved by the solvent but not absorbed by the fabrics. Therefore, it is not a problem.
4. The effect of adding surfactant and water to tetrachloroethylene cleaning agent was found to vary with each case according to the kind of dyes used on the different kinds of fabrics.
