Mark Grimwade has devoted more than three decades to the study of the behavior of precious metals and their alloys. As a consultant to the Worshipful Company of Goldsmiths and the World Gold Council, among others, he has been at the forefront of technical development. As a professor at London University, he has honed his skills of making complicated phenomena accessible to non-scientists. In this impressive expanded edition of his groundbreaking 1985 book, students and professional artists working in metal will find answers to questions that have plagued them for years