J) Incidentally, acids can migrate from material to material. Lining old shoe boxes with good quality acid-free paper will do little to guard the contents. The acid will get there in the end.

　　Paper from Rag

　　K) Paper is also commonly made from cotton and rag waste. This has the advantage of being lignin-free, but because there is much less cotton and rag than trees, it also tends to be much more expensive than wood pulp paper. You will still need to purchase from a reliable source though, since even rag paper and card can contain undesirable additives.

　　L) A reliable source for quality rag papers is a recognized art stockiest. Many water color artists insist on using only fine quality rag paper and board.

　　M) The main lesson to learn from this information is that you cannot rely on purchasing archival materials from the high street. The only safe solution is to purchase from specialist suppliers. It may cost rather more, but in the end you will know that your important and valuable data and images have the best home possible.

　　1. The corn-flake packet is cheaper than high grade card.

　　2. There are a lot of materials which can be used for making paper, but the superiority ones are soft wood, cotton and rags.

　　3. During the whole manufacturing process, the final product is made from a pulp of cellulose fibres.

　　4. In order to make white paper and card, the makers will add bleach.

　　5. Liguin is essential for the tree but it will make paper easy to break.

　　6. Many paper producers will preserve lignin during manufacture, because leaving the lignin will make more paper from a tree.

　　7. Acid is particularly harmful to photographic materials.

　　8. If the lignin is removed from the paper, the paper will be more expensive.

　　9. Although free of lignin, paper made from cotton and rag waste can also cost more money than wood pulp paper because there is much less cotton and rag than trees.

　　10. What we can learn from "Paper from Rag" is that you had better buy archival materials from specialist suppliers.

　　文章精要：

　　本文主要介绍了我们平常所见所用的纸的复杂性，通过介绍用木头和破布料造纸的过程，使我们对纸的类别、属性有了更深入的了解。

　　答案参考：

　　1. B 根据题干中的信息提示词corn—flake packet,high grade card,可定位到文章第二段，该部分最后提到corn-flake packet在制造过程中比高等级的纸(high grade card)便宜.

　　2. C 根据题干中的信息提示词soft wood，cotton and rags，可定位到文章第三段最后一句。

　　3. D 根据题干中的信息提示词final product，可将答案定位到D段，第二、三句提到最后的产品来源于纤维素纸浆。

　　4. D 根据题干中的信息提示词white paper and card，可将答案定位到D段，该部分最后提到为了得到白纸，纸张生产者在制造过程中添加了漂白粉和其他化学物质。

　　5. E 根据题干中的信息提示词essential for the tree，可将答案定位到E段，该部分提到木质素是木头的主要组成物，其作用是凝聚纤维素，但它会使纸张变得易碎。

　　6. F 根据题干中的信息提示词lignin，可将答案定位到F段，该部分最后提到许多纸张生产者在生产过程中会保留木质素，主要是因为它会增加树木的造纸产量。

　　7. G 根据题干中的信息提示词acid，可将答案定位到G段，该部分最后提到酸对相纸的原料尤其不利。

　　8. F 根据题干中的信息提示词lignin和paper可定位到文章的F段，因为该段提到，如果在纸张的生产中去除木质素，将会降低树木出产纸张的量，由此可以知道，去除了木质素的纸张价格必定会更加昂贵。

　　9. K 根据题干中的信息提示词cotton and rag waste可定位到文章的K段，该部分告诉我们，尽管用棉花和破布料造的纸里没有木质素，但它们要比木制的纸贵很多，这是因为棉花和破布料的数量比树木少得多，由此可以得出答案。

　　10. M 根据题干中的信息提示词Paper from Ra9可定位到文章的最后一段，该部分提出最好到专业的供应商那里去买档案材料，由此可以得出答案。