The scent was added during the colour printing process.

加入的气味在彩色印刷过程。

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It is the ink colour standards used in North America for process colour printing.

是北美洲所用的四色彩印油墨的标准规格。

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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。

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At the same time, colour printing (subtler, it turns out, than computer graphics) came into its own.

ECONOMIST: Science and history of colour

Then buttons are pressed and seven printing plants around the world receive an identical issue, together with all its sophisticated colour pages.

ECONOMIST: Our paper in the 1930s: Ninety-plus, and still young | The