Photos, letters, clippings, and other family documents should be stored unfolded because folding and unfolding breaks paper along the fold lines.

照片、信件、剪报或其他家庭文献应该以展开的方式储藏，因为折叠和展开会损害纸张的折线。

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These reference libraries typically contain files of clippings that include articles and photographs published by the paper, as well as articles and photos librarians clipped from elsewhere, including from tiny, short-lived publications.

FORBES: Finding Money in Newspaper Archives