prEN 12471, A Screening Test for Nickel Release.

SCREENING TEST FOR NICKEL RELEASE FROM ALLOYS AND COATINGS IN CONSUMER ITEMS THAT COME INTO DIRECT AND PROLONGED CONTACT WITH THE SKIN


TEG Home Page Nickel Home Page Legal Information The European Directive The UK Law The UK Guidance Notes Regulatory Tests Nickel Content Nickel Release Wear Test Spectacles Wear Test Non Regulatory Tests Scanning Nickel Release Other Information Insurance Implications FAQ Nickel Working Group Links	Introduction This is a summary of the proposed test method. The document describes a pre-test method which if chosen and the result is negative then is followed by one of the remaining two tests - a laboratory application or a field application to confirm the nickel release. These test methods may be done on their own. NOTE: The laboratory application and the field application were found to correlate well with the results from BS EN 1811:1999, the reference test method for nickel release for a variety of materials. Scope This European Standard presents a quick screening method, based on the use of dimethylglyoxime, suitable for the evaluation of nickel release from items that come into direct and prolonged contact with the skin, with special reference to nickel allergy. This test is not intended as a replacement for BS EN 1811:1999, but is designed to assist the Industry. Principle The method is based on the formation of a red complex when nickel ions come in contact with dimethylglyoxime solution in the presence of ammonia. In order to increase the sensitivity of the test pre-treatment with artificial sweat and heat is used to induce corrosion of the surface, simulating the influence of sweat when the object is in contact with the skin. This screening method gives a result in a short time. The result is indicative and provides guidance when evaluating objects for nickel release. People carrying out the tests shall have normal colour vision. NOTE: For a quantitative result the reference test method described in BS EN 1811:1999, the reference test method for nickel release has to be used. Test Report The test report for items tested under laboratory conditions only shall include: Identification of the sample including source, date of receipt, form of sample; Sampling procedure; The reference and a short description of the method used; Nickel release shall given as positive, negative, or doubtful with specification of which part of the object has been tested; Deviations from this standard method; Any unusual features observed during the testing; Date of test; Identification of the laboratory carrying out the test; Signature of the laboratory manager and operator. Other Information Copies of this standard (when published) will be available from: British Standards Institute 389 Chiswick High Road London W4 4AL +44 (0)20 8996 9001 +44 (0)020 8996 7001 Fax This Information is based on information declared to the Electronic Guide by the above companies and does not imply an endorsement by The Electronic Guide.

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Introduction

This is a summary of the proposed test method.

The document describes a pre-test method which if chosen and the result is negative then is followed by one of the remaining two tests - a laboratory application or a field application to confirm the nickel release. These test methods may be done on their own.

NOTE: The laboratory application and the field application were found to correlate well with the results from BS EN 1811:1999, the reference test method for nickel release for a variety of materials.

Scope

This European Standard presents a quick screening method, based on the use of dimethylglyoxime, suitable for the evaluation of nickel release from items that come into direct and prolonged contact with the skin, with special reference to nickel allergy.

This test is not intended as a replacement for BS EN 1811:1999, but is designed to assist the Industry.

Principle

The method is based on the formation of a red complex when nickel ions come in contact with dimethylglyoxime solution in the presence of ammonia. In order to increase the sensitivity of the test pre-treatment with artificial sweat and heat is used to induce corrosion of the surface, simulating the influence of sweat when the object is in contact with the skin. This screening method gives a result in a short time. The result is indicative and provides guidance when evaluating objects for nickel release. People carrying out the tests shall have normal colour vision.

NOTE: For a quantitative result the reference test method described in BS EN 1811:1999, the reference test method for nickel release has to be used.

Test Report

The test report for items tested under laboratory conditions only shall include:

Identification of the sample including source, date of receipt, form of sample;
Sampling procedure;
The reference and a short description of the method used;
Nickel release shall given as positive, negative, or doubtful with specification of which part of the object has been tested;
Deviations from this standard method;
Any unusual features observed during the testing;
Date of test;
Identification of the laboratory carrying out the test;
Signature of the laboratory manager and operator.

Other Information

Copies of this standard (when published) will be available from:

British Standards Institute

This Information is based on information declared to the Electronic Guide by the above companies and does not imply an endorsement by The Electronic Guide.

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