This International Standard is applicable to dental investment, brazing and refractory die materials regardless of the nature of the binding system or the particular application. This International Standard classifies investments into types according to their intended use and classes according to the burn-out procedure recommended by the manufacturer. This International Standard specifies requirements for the essential physical and mechanical properties of the materials and the test methods to be used to determine them. This International Standard also includes requirements for the information and instructions to accompany each package.