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UNI EN ISO 7490 : 2001

Withdrawn

Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

DENTAL GYPSUM-BONDED CASTING INVESTMENTS

Withdrawn date

08-10-2015

Published date

01-01-2001

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Contents
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.

DevelopmentNote
Supersedes UNI EN 27490. (07/2001)
DocumentType
Standard
PublisherName
Ente Nazionale Italiano di Unificazione (UNI)
Status
Withdrawn
Supersedes

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