_____ 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. Lignin 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.