португальский
papel ácido 1
The life of books is shorter (despite their being printed on acid-free paper).
2
Many collectors mount valuable, fragile posters on acid-free paper attached to canvas to protect them and to allow restoration.
3
Each corpse was carefully removed from what remained of its pine or oak coffin and was wrapped in acid-free paper.
4
Printed on acid-free paper.
5
ISBN 0-387-91495-1 ( acid-free paper) 1.
1
What we know is that paper can be handled only so much and preserved only so long (even if it is non- acid paper).