ASTM-D925 Historical Revision Information
Standard Test Methods for Rubber Property-Staining of Surfaces (Contact, Migration, and Diffusion)

ASTM-D925 - 2006 EDITION - SUPERSEDED
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Standard Test Methods for Rubber Property—Staining of Surfaces (Contact, Migration, and Diffusion)
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Scope

1.1 These test methods describe techniques to evaluate three types of staining or discoloration that rubber may cause when in contact with or in proximity to another surface that may be light colored.

1.2 The test methods also describe how to qualitatively evaluate the degree of staining or discoloration produced in such situations.

1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Significance and Use

Rubber in contact with light colored organic finishes may stain the surfaces in contact with the rubber (contact staining) and surfaces adjacent to or beyond the rubber (migration staining), especially under conditions of heat, pressure, or sunlight. When a light colored rubber veneer or organic coating covers a staining rubber compound, the staining ingredients can diffuse through the veneer or coating and stain the surface (diffusion staining). This staining of light colored surfaces is objectionable to the consumer.

These test methods provide a means of evaluating staining characteristics of rubber compounds but may not necessarily duplicate the effects of natural exposure conditions.

Results obtained should not be treated as being equivalent to any natural exposure, unless the degree of quantitative correlation has been empirically established for the material in question.

These test methods may be used for producer-consumer acceptance, referee purposes, and research and development work.

The two types of exposures (Fluorescent UV and Xenon Arc) are not equivalent and may produce different test results.

Keywords

color; heat discoloration; rubber articles; rubber products; sunlamp; ultraviolet discoloration; ICS Number Code 83.060 (Rubber)

To find similar documents by ASTM Volume:

09.01 (Rubber, Natural and Synthetic -- General Test Methods; Carbon Black)

To find similar documents by classification:

83.060 (Rubber Raw rubber, see 83.040.10)

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Document Number

ASTM-D925-06

Revision Level

2006 EDITION

Status

Superseded

Modification Type

Revision

Publication Date

March 1, 2006

Document Type

Test Method

Page Count

6 pages

Committee Number

D11.15