vbk
- 网络威比克;咔唑;德国柏林艺术家协会
vbk
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Direct dyes had good appetence to cellulose , so fiber was easy to be colored up and had high colorfastness . Especially of lightfast direct dyes had 4-5 degree colorfastness so as to could keep paper color stability . VBK fluorescent agent was obtained from modified VBL .
直接染料对纤维素纤维的亲和力高,纤维易着色,而且色牢度高,特别是耐晒型直接染料的耐晒牢度达到4-5级,能够保证纸面色相的稳定性。