Pernanent paper: Paper which is scid-free and made to stringent conditions for archival purpsdes. A neutral sized paper does not in itself qualify for the epithet of permamemt paper.
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- 耐久纸:在严格条件下生产,作档案记录用途的无酸纸张。中性施胶的纸张,并不能称为耐久纸。