This paper presents an outline of quality requirements of interleaf paper for packaging PS plates and photo films, and a summary of its possible side effects on the quality of photographic materials.

本文提出了PS版和胶片包装用衬纸对纸张的质量要求，以及不同质量的衬纸可能对感光材料造成的影响；并简要介绍了纸张的基本特性。

Do you read the p.s. at the end of the letter?

你看了信末的附笔没有？

※A fool's heart dances on his lips. 愚人心坦荡，挂在嘴唇上。
※A good name keeps lustre in the dark. 好的名声在黑暗中也会光芒四射。
※All is not at hand that helps. 有用的东西并不都是垂手可得的。
※A man is known by the company he keeps. 察其友知其人。
※A new broom sweeps clean. 新官上任三把火。
※A quiet conscience sleeps in thunder. 白日不做亏心事，夜半不怕鬼敲门。
※Downy lips make thoughtless slips. 嘴上没毛，办事不牢。
※Experience keeps a dear school, but fools learn in no other. 吃亏学乖代价高，笨汉非此学不好。
※Experience keeps no school, she teaches her pupils singly. 亲身经验，才是经验。
※Fine words butter no parsnips. 画饼充饥。

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