VW TL 226 Test Standard for the Effect of Paints on Vehicle Interior Materials

The technical delivery condition TL 226 is a regulation of Volkswagen AG and is used by VW and Audi, others. TL 226 refers to the painted, printed, heat-sealed and coated components of the vehicle interior.

Painted parts are first preconditioned according to TL 226 and then checked for various criteria, including:

• Adhesion: grid or cross cut DIN EN ISO 2409
• Scratch resistance (PV 3952)
• Emission (VW 50180 and its sub-regulations)
• Temperature resistance: heat storage, climate change testing (Audi: PV 1200, VW: BD 2005)
• Weather resistance (condensate stable climate according to DIN EN ISO 6270-2, light fastness (PV 1303) and corrosion change test (PV 1210)
• Resistance to aging: hydrolytic storage, sunlight simulation (DIN 75220) and abrasion resistance (PV 3906)
• Resistance to the environment: cleaning agents, perspiration and cream (PV 3964)

The tests are often combined, so a storage simulation is usually followed by a paint adhesion and scratch resistance test in addition to visual inspection.

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