NEN EN ISO 1564 : 1998

1 Scope
2 Normative references
3 Definitions
4 Classification by type
5 Requirements for characteristics and physical properties
    5.1 Biocompatibility
    5.2 Homogeneity (Sol state)
    5.3 Consistency: types 1 and 2 (Sol state)
    5.4 Extrudability: types 2 and 3 (Sol state)
6 Sampling
7 Test methods: basic conditions and procedures
    7.1 Specimen preparation
    7.2 Test conditions
    7.3 Number of specimens to be tested for pass/fail
          determinations
    7.2 Expression of results
8 Test procedures
    8.1 Homegeneity: type 1 only
    8.2 Consistency: types 1 and 2
    8.3 Extrudability: types 2 and 3
    8.4 Extrusion temperature: types 2 and 3
    8.5 Gelation temperature
    8.6 Detail reproduction
    8.7 Compatibility with gypsum
    8.8 Recovery from deformation
    8.9 Strain in compression
    8.10 Resistance to tearing
9 Required instructions for use
10 Requirements for packaging and marking
    10.1 Packaging
    10.2 Labelling and marking

Defines requirements for essential physical properties and other characteristics of impression materials with reversible agar hydrocolloid as a gel-forming ingredient, together with tests defined for determination of compliance with those requirements. In addition, it defines requirements regarding the manufacturer's instructions, and essentials for packaging, labelling and marking.