Acid-free paper and paper products are made so that they do not contain acid. Ordinary cheap paper often does, and over the years it turns yellow and becomes brittle.

Acid-free paper and paper products Acid-free 的紙和紙製品, are made so that做出來就是要讓 they它們 do not contain acid不含酸。 Ordinary cheap paper普通的便宜紙 often does就常常含酸, and over the years經過多年 it它 turns yellow會變黃, and becomes brittle、變脆。

Acid-free paper is meant to last, so libraries, museums, and people who keep photos, drawings, or important papers use it. You will see the words on art paper, albums, and boxes for storage. It is a shop-and-workshop word, not a word for casual chat.

Acid-free paper這種不含酸的紙 is meant to last就是做來放得久的, so所以 libraries圖書館, museums博物館, and people還有那些 who keep photos, drawings, or important papers收藏照片、圖畫或重要文件的人 use it都用它。 You你 on art paper會在美術紙, albums相本, and boxes for storage和收納盒上 will see the words看到這幾個字。 It它 is a shop-and-workshop word是店裡和工作室裡的字, not a word for casual chat不是閒聊用的字。

Though actually, acid-free does not mean “no chemicals at all,” and the tidy label does not always mean museum quality — it means the paper is not acidic, so it should not slowly destroy itself, or what you keep in it. If you are keeping something precious, people look for acid-free and, often, lignin-free too.

Though actually不過其實, acid-free does not mean acid-free 並不是說 "no chemicals at all" 完全沒有化學物質, and the tidy label這個漂亮的標籤 does not always mean也不一定代表 museum quality博物館等級 — it means它是說 the paper這張紙 is not acidic不是酸性的, so所以 it它 should not slowly destroy不應該慢慢毀掉 itself自己, or what you keep in it或你收在裡面的東西。 If如果 you你 are keeping something precious要保存珍貴的東西, people大家 look for會認明 acid-free, and, often而且常常, lignin-free too也認明 lignin-free。