The chemical composition, microstructure, hardness, and color of a series of ancient Egyptian Blue samples from Egypt, Mesopotamia, and Western Europe (Roman period) have been investigated using principally atomic absorption spectrophotometry and scanning electron microscopy. Egyptian Blue has been produced in the laboratory by using a range of compositions and firing procedures and has been compared with the ancient material. From these results, information on the techniques used in antiquity to produce Egyptian Blue has been obtained. See also 21-1449 for reference to book. -- AATA