The calotype was revolutionary in its use of chemically treated paper in which areas hit by light became dark in tone, producing a negative image.

卡罗摄影法对化学处理纸的使用是革命性的，其中光照区域色调变暗，形成负像。

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Printing a black-and-white negative on to colour paper produces a similar monochrome effect.

将黑白底片冲印在彩色纸上产生一种类似的单色效果。

《柯林斯英汉双解大词典》

This "negative," as Talbot called it, could then be used to print multiple positive images on another piece of treated paper.

这种被 Talbot 称之为“负片”的东西，随后会被用在另一张经过处理的纸片上来洗印多张正面图像。

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Using the reverse approach, Sian Bonnell, a British photographer, has photographed a jelly mould with a pinhole camera, then digitally scanned the paper negative and produced a laser print.

ECONOMIST: The daguerreotype is back

The paper found a negative relationship between fiscal consolidation and growth forecast errors and concluded that fiscal multipliers during the crisis must have been larger than had been assumed.

FORBES: Olli's Follies: Is Debate About Fiscal Multipliers Unhelpful?

The SEC staff declined to recommend IFRS, in a paper that was more negative than observers had expected.

ECONOMIST: Global accounting standards