Its a Sticky Business

Plant-based glue can be made from simple starch and water this type is often used for gluing paper and in other crafts. Wallpaper paste is partially methylated cellulose (21.14)—generally between 1.5 and 2.5 of the three hydroxyl groups that could possibly be methylated have been. 

Gums are usually defined as polysaccharides of natural origin—they are often used in the food industry as thickening agents (vide infra), but gum arabic, the hardened sap of acacia trees, was long used as an adhesive for stamps and also as a food stabilizer and a binder in watercolor paints and in lithography. It is a mixture of polysaccharides and glycoproteins, the 

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