Adhesives may be classified by temperature (hot-, cold-, intermediate-, room-temperature setting, etc.); by type of solvent (water, alcohol, etc.); by type of application (brush, roller, spray, etc.); or by origin (animal, vegetable, or synthetic). They may be further classified as natural or synthetic (resin). The natural adhesives are primarily of animal or vegetable origin (sodium silicate (water glass) being virtually the only inorganic natural product important as an adhesive) and include animal glue, casein, blood albumen (which is unimportant as an adhesive in archival work), and vegetable adhesives. The synthetic resin adhesives include the thermoplastic resins, the thermosetting resins, and the elastomeric adhesives.
The adhesives used in archival work must exhibit three properties: 1) they must wet the surfaces to be joined but not so much as to cause the adhered materials to cockle; 2) they must have sufficient flexibility so as not to crack when the joint is flexed; and 3) they must be strong but not as strong as the materials they bond, so that stress to the point of failure of the joint will not damage the archival material but will result only in the failure of the adhesive. See also: ALBUMEN ;CASEIN ;CEMENT (2) ;COLD GLUE ;DEXTRIN ;FISH GLUE ;FLEXIBLE GLUE ;GLAIR ;GLUCOSE-GLYCOL PASTE ;GLUE ;HARD GLUE ;HOT-MELT ADHESIVE ;ISINGLASS ;MICROENCAPSULATED ADHESIVE ;MUCILAGE ;PADDING COMPOUND ;PASTE ;POLYVINYL ACETATE ;RABBIT SKIN GLUE ;RESINOUS ADHESIVES ;RICE GLUE ;RUBBER ADHESIVES ;VEGETABLE GLUE ;WOOD PASTE .
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Timestamp: Saturday, 19-Nov-2011 13:18:38 PST
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