ISO 7619-1 Rubber, Vulcanized or Thermoplastic - Determination of Indent Hardness - Part 1: Durometer Method (Shore Hardness)

In the ISO 7619-1 standard developed by the International Standards Organization (ISO),

A scale for rubbers in the normal hardness range,
D scale for rubbers in the high hardness range,
AO scale for rubbers and cellular rubbers in the low hardness range, and
AM scale for thin rubber test pieces in the normal hardness range

A test method is described for determining the indentation hardness (shore hardness) of vulcanized or thermoplastic rubber using durometers.

This standard was later canceled and replaced by the ISO 48-4 standard.

The hardness of the rubber, measured with a durometer (shore hardness), is determined from the rubber's response to an applied indentation. The response usually depends on the following factors:

elastic modulus of rubber
Viscoelastic properties of rubber
Thickness of test piece
indentation geometry
applied pressure
Pressure rise rate
Range where hardness is recorded

Because of these factors, although correlations have been established for some rubber types and compounds, it is not recommended to directly relate results to international rubber hardness grades using a durometer (shore hardness).

Durometers were originally portable hand tools that were considered particularly suitable for measuring on products. However, many laboratories today use them in a stand with a weight applied to the presser foot to significantly increase accuracy.

The ISO 48-2 standard includes hardness measurements for the purpose of determining the hardness between international rubber hardness degrees 10-100. The relationship between durometer values and international rubber hardness degrees is included in the standard.

The methods described in this standard may involve the use or production of substances or the generation of waste that constitute a local environmental hazard. In this regard, it is necessary to refer to appropriate standards relating to safe handling and disposal after use.

Our organization, among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, with its trained and expert staff and advanced technological equipment, determination of indentation hardness in rubber, vulcanized or thermoplastic products within the scope of ISO 7619-1 standard (durometer method, shore hardness). ) also provides testing services.