ULTRASONIC DYEING OF COTTON FABRICS WITH RED REACTIVE DYESTUFF

Abstract

In this study, comparison of dyed 100% cotton knitted fabrics according to two different methods named “ultrasonic-conventional” and “conventional” methods is done by conducting rubbing fastness, washing fastness and water absorption tests. As well, color measurement of samples is measured with a spectrophotometer. Red DE2GF Remazol brand reactive dye is used as dyestuff. NaCl salt and Na2CO3 soda ash contents are kept constant during dyeing of samples. The variants during this study are selected as amount of dyestuff and time duration in sonication application. With the variants, we had 5 different samples for the “ultrasonic-conventional” dyeing method and 4 samples for the “conventional” dyeing method. With the comparison of both methods, the color depth of samples dyed with “ultrasonic-conventional” method gave higher results and it is concluded that target color shades might be obtained using less dyestuff amounts by the “ultrasonic-conventional” method. In this study, as the cost of “ultrasonic-conventional” method is calculated and not found high; the “ultrasonic-conventional” method has potential to be a promising method due to its less dyestuff amount consumption and less polluting effect to the environment.

Keywords

• ultrasound
• dyeing
• cavitation
• colour measurement
• fastness.