Editing Adhesive (section)

====Natural====
Natural adhesives are made from organic sources such as vegetable [[starch]] ([[dextrin]]), natural resins, or animals (e.g. the milk protein [[casein]]<ref name="cornell">[http://www.ccmr.cornell.edu/education/ask/index.html?quid=160 CCMR – Ask A Scientist!] {{webarchive|url=https://web.archive.org/web/20110928023201/http://www.ccmr.cornell.edu/education/ask/index.html?quid=160 |date=2011-09-28 }}</ref> and hide-based [[animal glue]]s). These are often referred to as [[bioadhesives]].

One example is a simple paste made by cooking flour in water. Starch-based adhesives are used in [[corrugated board]] and [[paper bag|paper sack]] production, paper tube winding, and [[wallpaper adhesive]]s. Casein glue is mainly used to adhere glass bottle labels. Animal glues have traditionally been used in bookbinding, wood joining, and many other areas but now are largely replaced by synthetic glues except in specialist applications like the production and repair of stringed instruments. [[Albumen]] made from the protein component of blood has been used in the [[plywood]] industry. [[Masonite]], a wood hardboard, was originally bonded using natural wood [[lignin]], an [[organic polymer]], though most modern particle boards such as [[Medium-density fiberboard|MDF]] use synthetic thermosetting resins.