EN ISO 7490 : 2000

Foreword
Introduction
1 Scope
2 Term and definition
3 Classification
4 Requirements
  4.1 Appearance of powder
  4.2 Fluidity at working time
  4.3 Setting time
  4.4 Compressive strength
  4.5 Linear setting expansion
  4.6 Linear thermal expansion
5 Sampling, test conditions and mixing
  5.1 Sampling
  5.2 Test conditions
  5.3 Mixing
6 Test methods
  6.1 Visual examination
  6.2 Fluidity at work time
  6.3 Setting time
  6.4 Compressive strength
  6.5 Linear setting expansion
  6.6 Linear thermal expansion
7 Manufacturer's instructions
8 Packaging
  8.1 Packaging
  8.2 Mould lining
9 Marking

Specifies requirements for, and establishes a classification of, gypsum-bonded casting investments together with the test methods to be used to determine compliance with these requirements. Applies to gypsum-bonded investments suitable for casting dental gold alloy which have liquid temperatures not greater than 1080 Degrees C. Coverage includes: sampling, packaging and marking. Also includes annexes, tables and diagrams.