Process inks: Cyan, magenta, yellow and black inks as a set of four for process colour printing.

四色墨：配制为一套，供四色彩印用的油墨，它们分别是青蓝，洋红，黄和黑。

youdao

Water-soluble inks: inks in which the pigments are soluble in water. used in screen process printing printing from rubber plates and in gravure.

水溶性墨：墨内颜料可溶于水者。应用于四色网印，橡胶版和凹版印刷。

youdao

Precisia's president, James Rohrkemper, believes that the use of conductive inks and high-speed printing processes could cut antenna costs by 50%.

FORBES: Touchy Circuits

As Xerox fiddled with financial engineering, Canon continued to invest in new technologies to gain ground in the copier market, with new methods for printing multiple colours and finer, more efficient inks.

ECONOMIST: Canon