发明授权
US4800043A Colorants for ball point pen and ribbon inks derived from pararosaniline process residue 失效
用于圆珠笔和色带墨水的着色剂衍生自仲磺酰胺工艺残留物

Colorants for ball point pen and ribbon inks derived from pararosaniline
process residue
摘要:
Reddish-brown to yellow shade colorants suitable for ribbon and ball point inks are produced from the glassy waste by-product of pararosaniline manufacture.
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