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 nonscientists. 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.