Search standard for testing available at SKZ


Durable – reliable – safe
Everyday life without plastic products is impossible. Therefore it's important that they fulfill their tasks as good as perspected. We are happy to perform the necessary quality assurance tests for this purpose.

Test methods

Tested safety
Safety and outstanding quality are good sales arguments for your products. In our accredited test laboratory, we test and certify a wide range of different plastic products using numerous test methods.

Product certification

Confidence bonus for certified products
Test seals increase confidence in a product and the associated tests for quality assurance. Our accredited test laboratory will also test and certify your products.

Sponsors and Partner
Test methods
Product certification
Damage analysis
SKZ Whitepaper
Circular Economy
Enabler projects
Quality policy
Certification procedure
Our Mission

Ageing tests

Ageing tests are of crucial importance in order to examine and ultimately guarantee the long-term stability of plastics. Our test methods simulate various environmental influences, including UV radiation, temperature stresses and chemical effects, in order to identify potential weak points at an early stage. These comprehensive tests detect possible changes such as cracking, color changes and embrittlement effects. This enables manufacturers to develop high-quality products that can withstand real-life conditions of use.

Our methods make it possible to accelerate stresses caused by environmental influences. As a result, our customers benefit from a time advantage compared to processes under normal stress.

Dr. Irene Reuther
Group Manager | Special services and expert reports
Robin Kroh
Project Manager | Construction Products

Further details on the test method

Some of our test methods
  • General chemical resistance test, also at temperature, e.g. according to DIN EN ISO 175 or DIN EN 1847
  • Autoclave test in water up to 130 °C
  • High-pressure autoclave test up to 100 °C and 50 bar oxygen overpressure, e.g. in accordance with DIN EN ISO 13438
  • Cold storage down to -60 °C, e.g. in accordance with DIN EN 495-5
  • Climate change test, also in accordance with automotive regulations such as PV 1200
  • Constant climate storage, e.g. in accordance with RAL GZ 716
  • Salt spray test, e.g. in accordance with DIN EN ISO 9227
  • Stress crack testing (ESC), e.g. bending strip test according to DIN EN ISO 22088-1 and DIN EN ISO 22088-3
  • Stress corrosion cracking test (ESC) using FNCT in accordance with ISO 16770
  • Thermal cycling test
  • Heat ageing, hot storage or oven ageing up to 300 °C, e.g. in accordance with DIN EN 14575 or DIN EN ISO 13438
  • Root strength test according to FLL guideline or DIN EN 13948
  • Creep rupture test according to DIN EN ISO 1167 and DIN EN ISO 9080
Which sample geometries can we test?

The choice of specimen geometry depends heavily on the intended application of the plastics, as different products are subject to different requirements and loads. The test method also has an influence on the required geometry. For example, the following are used

  • Sheets and films
  • Tubes or rods
  • Injection molded parts
Technical test equipment
  • Modern chemical laboratory for the safe handling of hazardous substances
  • 25 high-pressure autoclaves (up to 50 bar)
  • 10 laboratory autoclaves (up to 4 bar)
  • Over 700 pressure stations for pipe testing (up to 200 bar)
  • Over 30 stations for temperature change tests on pipes (Ø 6 mm to 315 mm)
  • 50 heating ovens 
  • 5 FNCT basins with a total of 54 measuring stations
  • Several cold chambers
  • Various climate change chambers
  • Salt spray chamber with a sample holding area of up to 1.4 m x 0.5 m
What are typical areas of application for ageing tests?
  • In the automotive industry, ageing tests ensure the durability of plastics in vehicle components such as bumpers and interior trim. 
  • In the construction industry, plastics are used in window frames and seals, where ageing tests ensure structural integrity under environmental influences. 
  • In the electronics industry, plastics are used as insulating materials for components, where ageing tests preserve the electrical properties. 
  • The packaging industry uses ageing tests to ensure the strength of plastic packaging over the storage period. 
  • In medical technology, these tests ensure that plastics in devices and implants can withstand the special requirements and do not pose any health risks.

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SKZ · German Plastics Center
Friedrich-Bergius-Ring 22
97076 Würzburg

Telefon: +49 931 4104-0

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SKZ Training Center – Welding
Frankfurter Str. 19 c
97082 Würzburg

Telefon: +49 931 4104-123

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SKZ · Branch office Halle
Training and Research Center
Köthener Str. 33a
06118 Halle (Saale)

Telefon: +49 345 53045-0

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SKZ · Branch office Horb
Training Center
Rauher Grund 9
72160 Horb am Neckar

Telefon: +49 7451 62457-0

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SKZ · Branch office Peine
Training Center
Woltorfer Str. 77, Halle G
31224 Peine

Telefon: +49 5171 48935

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EZD · Branch office Selb
European Center for Dispersion Technologies (EZD)
Weißenbacher Str. 86
95100 Selb

Telefon: +49 9287 99880-0

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Sales partner – Italy
Via Buonarotti 175
20900 Monza, Italy

Telefon: +39 039 281561

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Sales partner – Romania
Plastics Bavaria Equipment & Systems srl
Str. Iancu Jianu, nr. 26
500178 Braşov, Romania

Telefon: +40 268 412 559
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SKZ Standort Würzburg, SKZ Weiterbildung

SKZ – Testing GmbH
Friedrich-Bergius-Ring 22
97076 Würzburg

Tel. +49 931 4104-0

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