抄録
Color change during high pressure steaming in polyester over-printing was investigated on the basis of spectral reflectance curve, CIE-chromaticity diagram and complemental chromaticity diagram.
The results obtained were as follows.
1) Color change during the steaming in the over-printing was illustrated by spectral reflectance curves and CIE-chromaticity diagram. Considerable difference in color early in the steaming was gradually converged to a point on the diagram by continuing the steaming to 120min. Varying the steaming temperature, CIE-chromaticity points were changed through the different routes.
2) Complemental tristimulus value was calculated by substituting Kubelka-Munk function instead of spectral reflectance ρλ in the equation for calculation of tristimulus value X, Y, Z. It shows a color character of the dye, independent of the dye concentration on the fabric.
Considerable color change was observed in over-printing on the complemental chromaticity diagram, but almost no change in mixed color printing. When steaming temperature rises, color change is reduced.
3) Dye concentration in the fabric extracted with dimethylsulfoxide was compared with the surface dye concentration calculated by CIBA-Q method. A distinct difference was investigated between the both results.
