Across
- 4. A coloured organic compound attracted to its substrate.
- 6. Yellow or red stains found on paper that are caused by the presence of iron and microorganisms.
- 7. Animal-based sizing material.
- 9. The act of removing acids from paper.
- 10. Common acidic sizing technique.
- 11. The separation of plant fibres in paper production.
- 13. Animal skin used as a writing substrate.
- 15. Tool used to make paper out of pulp.
- 16. Plant based sizing material.
- 17. Dried reeds used as a writing substrate.
- 18. Organisms that feed on paper and appear as spores.
- 20. Reduces ink bleeding and makes the paper stronger, tougher, and longer lasting.
Down
- 1. The movement of soiling due to moisture in the paper.
- 2. Used to produce a coloured film or product.
- 3. An ink made from gull nuts.
- 5. Causes the decomposition of cellulose into smaller fragments.
- 8. Turns paper brittle through the breaking of bonds due to hydrolysis.
- 12. A medium typically used to write on paper.
- 14. Plant-based polysaccharide.
- 19. The glue that provides strength in plants.