enamel (Scope note)

The term 'enamel' has not been included as a Narrow Term (NT) of 'glass' for practical reasons. Although technically enamel is glass with a lower melting temperature, the way enamel is applied and worked is quite different from glass, and users tend to search separately for objects made of either. See also 'enamelled' in the Techniques Thesaurus. N.B. - The 'enamel' used in the Iron Age is not true enamel, which is fused by heat. It is heated opaque glass, which was pressed when molten into prepared metal fields or cells, and allowed to cool and harden. For these records, the term 'enamel' is entered in Description, the term 'enamelled' in Technique, but the Material entered is 'glass'. - Records for ceramics which are decorated by painting or placing enamels do not have the term 'enamel' entered as a Material, although it is recorded in Description.