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3. lamella The lignin rich layer which cements the cell walls of two adjoining cellulose fibres together
5. The ______cell wall is the rigid outermost cell wall in plant fibres containing about 70% lignin, that is usually removed during cooking
6. A three letter abbreviation to describe the molecular polydispersity of cellulose
7. Inorganic impurities in pulp, e.g. silica, that contribute to filter blockages and spinning faults in Lyocell and Viscose processes
9. The process during which cellulose fibre properties are altered through repeated drying and wetting
11. Fibre ______ is measured using a Morfi analyser
12. The structural level of cellulose that is made up of amorphous and crystalline cellulose
14. This cell wall makes up the bulk of the cellulose fibre and is the main driver of the physical and mechanical properties of the fibre
15. A term to describe the ease with which chemical reagents penetrate cellulose fibres to reach the reaction sites of the cellulose molecules
17. Many of these together form a cellulose fibre
18. The major non-carbohydrate component of wood that contributes to pulp yellowing
19. Openings in the surface of the fibre that can affect cellulose accessibility

1. The low ordered region in a cellulose matrix
2. Colour forming compound
4. The major non-cellulosic carbohydrate component of wood that decreases the alpha content of pulp
8. The degree of ______ of cellulose is inferred by dissolving the cellulose in a solvent and measuring the solution viscosity
10. The highly ordered region in a cellulose matrix
13. A term to describes the reaction rate or the extent to which cellulose reacts with chemical reagents
16. A functional group consisting of a carbon atom double bonded to an oxygen atom that can affect cellulose reactivity
18. Central cavity of a cellulose fibre