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| papel alcalino; papel exento de ácido (Paper with a low or zero level of acid. This does not imply that paper is alkaline-buffered); papel sin ácido (Paper with a low or zero level of acid. This does not imply that paper is alkaline-buffered) | |||
| papel neutro | |||
| papel exento de acidez; papel libre de acidez; papel libre de ácido; papel libre de ácidos | |||
| papel neutro (no ácido) | |||