vbk
- 网络威比克;咔唑;德国柏林艺术家协会
vbk-
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。