At the time of decolorization processing by the ozone water of the denim product color development process manner and that product null by the color development aid addition

摘要

PURPOSE:To obtain a coloring method (including decoloring) without damaging cloth, producing harmful substance or injuring health and a colored product by decoloring a denim product without using an oxidizing agent such as sodium hypochlorite or an enzyme. CONSTITUTION:The objective coloring method in decoloring after dyeing with indigo dye (including indigo based dye derivative) of a denim product is characterized in that an indigo dye (including an indigo based dye derivative) dying cloth of the denim product is subjected to chemical reaction and the hue is changed to yellowish blue by charging a denim product and a proper amount of potassium bromide as a coloring auxiliary into a cleaning tank and stirring and immersing these components for a definite time while continuously injecting an ozone gas.