This paper meets the requirements for ANSI/NISO Z39.48-1992 (Permanence of Paper).
All materials in this book meet eatablishedcriteria for their preservation for several hundred years without significant deteriorration under normal use and storage conditions.
一般来说,如果纸张用的是永久性纸张,厂商都会乐于标榜这一点,而不会仅仅强调是无酸纸。对比Moleskine和Graphic Image,前者仅仅声明是无酸纸,而后者则大大方方的标上了“This paper meets the requirements for ANSI/NISO Z39.48-1992 (Permanence of Paper).”这句话,大家可以在很多现代西方精装书看到,表明它们用的是永久性纸张,可供收存入档长期保存之用。