egg (material)

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  5. materials (substances)
  6. [materials by origin]
  7. biological material
  8. animal material
  9. [animal material by form or function]
  10. [animal material by egg and egg components]
  11. egg
Scope note
Material derived from eggs, which in the context of art materials are usually the ellipsoidal shell and embryonic contents produced by birds. For paintings, the egg contents are used as a tempera medium. The whole egg, yolk, or white may be used sometimes mixed with oil and/or resin. The egg yolk is a stable emulsion of an aqueous liquid with an oily, proteinaceous medium which dries quickly into a hard, insoluble film. Egg white has been used as a medium for illuminated manuscripts. It is also used as a size for attaching gold leaf. Albumen is the adhesive substance of egg white. As a pure film, albumen is clear, brittle, and water soluble. Water solubility can be decreased by heating or adding tannin. For the exterior of a bird egg comprising the brittle shell composed of keratin and calcite, use "eggshell (animal material)."
egg
Accepted term: 29-Apr-2024