牙科. 耐高温包埋材料和模铸材料

[中文适用范围]： 本国际标准规定了牙科铸造投资材料、牙科钎焊投资材料、牙科压铸陶瓷投资材料和牙科耐火模具材料的要求、测试方法，无论其组成如何。它将这些产品分类为类型和类别，并规定了标记、标签和制造商说明的要求。此外，还规定了产品的物理和机械性能的基本要求及相应的测试方法。 [外文原描述]： ISO 15912:2016 gives requirements and test methods for determining the compliance of dental casting investment, dental brazing investment, dental pressable-ceramic investment and dental refractory die materials used in the dental laboratory, regardless of the composition of the refractory powder, the composition of the binder, or the particular application. ISO 15912:2016 classifies such products into types and classes, according to their intended use and the burn-out procedure recommended by the manufacturer. It also gives requirements for marking, labelling and manufacturer's instructions. It specifies requirements for the essential physical and mechanical properties of the products and the test methods to be used for determining them. NOTE 1 Compliance with all of the requirements presented in Clause 5 may not be necessary for some products, and a requirement might not be applicable to a product with a particular binder chemistry or be intended for an application in which that requirement is irrelevant. When this is the case, a clear statement to this effect is given according to Clause 5. NOTE 2 A specific quantitative requirement for setting expansion is not included in this International Standard. If the setting expansion of gypsum-bonded investment is measured, then the procedure given in ISO 6873[1] can be considered ? a procedure not recommended, however, for investment materials with other binders.