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Hardness and scratch testing

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The hardness of plastics is determined differently depending on the type of material. OMPG offers both the classic ball indentation hardness and the Shore hardness measurement for elastomers. Many surface tests are also associated with hardness.

Various scratch tests are required, particularly for automotive applications. The spectrum ranges from Erichsen and Oesterle bars to abrasion and scuffing tests. In some cases, entire scratch grids are applied mechanically using the Erichsen Model 430P testing machine and the color change is then determined.

Lacquer tests combine climate storage, exposure and chemical tests (cream or cleaning agent resistance) with various adhesion tests. Cross-cut, cross-cut and scratch tests are used to assess paint adhesion. 

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Here you will find a list of all test standards for which we offer services in this area. All currently accredited standards can be found on the Accreditation page in our list of services.

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List of test standards for Hardness and scratch testing
BMW - GS97034-1

Surface inspection of automotive interior materials – Manual abrasion test

BMW - GS97034-4

Color abrasion

BMW - AA-0026

Aging resistance test

BMW - AA-0180

Cross-cut test

BMW - AA-0203

Hydrolysis test

BMW - AA-0213

Condensation water constant climate test

BMW - AA-0635

Evaluation scheme according to various surface tests of automotive interior materials

BMW - AA-P 177

Grid cut

BMW - AA-P 257

Resistance of painted interior surfaces to sunscreen

BMW - AA-P 276

Temperature change test

BMW - AA-P 296

Abrasion resistance with Abrex standard tester

BMW - AA-P 308

Hydrolysis test

BMW - GS97034-2

Fingernail test

BMW - GS97034-3

Shoe sole test

BMW - GS97034-5

Durability

BMW - GS97034-6

Soiling behavior

BMW - GS97034-8

Writing inclination

BMW - GS97034-9

Scratch test

DIN 53435

Testing of plastics – Bending test and impact test on dynstat test specimens

DIN CEN ISO/TR 19402:2022-02

Coating materials – Adhesion strength of coatings

DIN EN ISO 1518-1:2023-05

Paints and varnishes – Determination of scratch resistance – Part 1: Constant-loading method (Test with Erichsen test rod S318)

DIN EN ISO 2039-1

Plastics – Determination of hardness – Part 1: Ball indentation test

DIN EN ISO 21509

Plastics and ebonite – Verification of Shore durometers

DIN EN ISO 2409:2020-12

Paints and varnishes – Cross-cut test (also cross cut / St. Andrew's cross with adhesive tape tear-off)

DIN EN ISO 4628-1

Paints and varnishes – Evaluation of degradation of coatings – Designation of quantity and size of defects, and of intensity of uniform changes in appearance – Part 1: General introduction and designation system

DIN EN ISO 4628-2

Paints and varnishes – Evaluation of degradation of coatings – Designation of quantity and size of defects, and of intensity of uniform changes in appearance – Part 2: Assessment of degree of blistering

DIN EN ISO 4628-4

Paints and varnishes – Evaluation of degradation of coatings – Designation of quantity and size of defects, and of intensity of uniform changes in appearance – Part 4: Assessment of degree of cracking

DIN EN ISO 4628-5

Paints and varnishes – Evaluation of quantity and size of defects, and of intensity of uniform changes in appearance – Part 5: Assessment of degree of flaking

DIN EN ISO 4628-8

Paints and varnishes – Evaluation of degradation of coatings – Designation of quantity and size of defects, and of intensity of uniform changes in appearance – Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect

DIN EN ISO 868

Plastics and ebonite – Determination of indentation hardness by means of a durometer (Shore hardness) (former standards: DIN 53505; DIN ISO 7619-1)

DIN ISO 815

Rubber, vulcanized or thermoplastic – Determination of compression set – Part 1: At ambient or elevated temperatures

GMW 14688

Scratch and Mar Resistance

ISO 48-4

Elastomers or thermoplastic elastomers – Determination of hardness – Part 4: Indentation hardness by durometer method (Shore hardness)

ISO 48-5

Elastomers or thermoplastic elastomers – Determination of hardness – Part 5: Indentation hardness by IRHD pocket device method

Mercedes-Benz DBL 1302

Coating of plastic parts in the vehicle interior (predecessor standard: DBL 7384)

PV 3905

Organic materials – Ball drop test

VW PV 3952

Plastic components – Determination of the scratch resistance of bright sprayed surfaces in vehicle interiors and exteriors

VW PV 3974

Plastic components – Determination of the writing strength of bright sprayed surfaces in vehicle interiors and exteriors

VW TL226

Paintwork on vehicle interior materials – Requirements