When the copy positive, film and photographic film adaptation and between line - space - width.

在拷贝阳图时, 需在底片与感平片之间稠不不合与栅距等阔的线片.

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Black - and - white dupe positive film.

黑白 翻正片(摄影).

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The good results have been obtained after application of coating gelatin to oil - soluble color positive film.

把A、 B两 种类型的表面胶应用于油彩正的护膜、隔层,获得了良好的结果.

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