【摘要】 <正> 一、前言快磺素黑(Rapidazol Black,音译拉披达唑黑,简称拉黑或拉元)是目前我国各印染厂普遍使用的黑色印花染料,常用与活性染料同印。它色泽乌黑鲜艳、印花方便、印疵少,更多还原

【Abstract】 In this paper, (1) an investigation was made of the effects of such parameters as liquor ratio, amount of sodium suifite required, pH value and reaction temperature on the yield, stability and reaction speed of the diazonium sulfonic acid, a better and more reasonable preparation process has been thus suggested; (2) the controlling of moisture content was taken as the key point to the steaming develop method of Rapidazol Black in calico-printing; and (3) the neutral substitute for chrome alum in printing paste has been studied with a view of reducing pollution; sodium or potassium idodate and sodium chlorate being recommended as desirable substitutes.更多还原