A compound of Formula (1) or asalt thereof: wherein: X is N or C(CN); Z is optionally substituted naphthyl;and Ar is an aryl group carrying at least one nitro substituentand optionally one or more further substituents. Also compositions, inks, printing processes, printed material and ink-jet cartridges.
Formula (1)的化合物或其盐:其中:X为N或C(CN);Z为可选择取代的
萘基;Ar为携带至少一个硝基取代基且可选择一个或多个进一步取代基的芳基团。此外还包括组合物、油墨、印刷工艺、印刷材料和喷墨墨盒。