Fogging Testing
What is Fogging Testing?
Fogging testing involves determining the fogging behavior of automotive interior materials. Volatile organic compounds (VOCs) from interior materials can deposit as a film on the windshield. The test quantifies this effect gravimetrically and/or reflectometrically.
Test Method
A test specimen is heated in a fogging beaker at 100°C for 16 hours. The VOCs condense on a cooled surface (21°C).
Evaluation:
• Gravimetric: Condensate mass on aluminum foil (mg)
• Reflectometric: Residual gloss on glass plate (%, 60° angle)
Heating temperature: 100°C ± 0.5°C
Cooling plate: 21°C ± 1°C
Test duration: 16 h ± 0.25 h
Fogging Testing According to OEM Standards
The following table shows all OEM-specific standards for fogging testing covered by the ASO laboratory:
| Manufacturer | Standard | Description |
|---|---|---|
| German Institute for Standardization (DIN) | DIN 75201-A | Fogging behavior |
| German Institute for Standardization (DIN) | DIN 75201-B | Fogging behavior |
| General Motors | GM 9305P | Fogging |
| General Motors Europe | GME 60326-A | Fogging |
| General Motors Europe | GME 60326-B | Fogging |
| General Motors Worldwide | GMW 3235-A | Fogging |
| General Motors Worldwide | GMW 3235-B | Fogging |
| Publisher | VW 50181 | Fogging behavior |
| International Organization for Standardization (ISO) | ISO 6452 | Fogging behavior |
| Nissan Motor Co. | NES M0161 | Fogging |
| SAE International | SAE J1756-A | Fogging |
| SAE International | SAE J1756-B | Fogging |
| Stellantis/Opel | KEUR 00822-120 | Fogging behavior |
| Stellantis/PSA | D45 1727 PSA | Fogging |
| Stellantis/PSA | D45 1727-A | Fogging |
| Stellantis/PSA | D45 1727-B | Fogging |
| Volkswagen Group (VW/Audi/Porsche/SEAT/Škoda) | PV 3015 | Fogging testing according to standard |
| Volkswagen Group (VW/Audi/Porsche/SEAT/Škoda) | PV 3920 | Fogging testing according to standard |
| Volvo Car Corporation | VCS 1027,2719 | Fogging |
| Volvo/Scania | STD 1082 | Fogging |
| Volvo/Scania | STD 420-0003 | Fogging |
Frequently Asked Questions About Fogging Testing
What does fogging testing measure?
The amount of volatile substances that outgas from interior materials when heated and deposit as condensation on glass surfaces. High fogging values = cloudy windshield = safety risk.
What is the difference between gravimetric and reflectometric?
Gravimetric (mg) measures the condensate mass – the total amount of volatile substances. Reflectometric (%) measures the residual gloss of a glass plate – the optical impairment. Both are often determined in parallel.
What limit values apply to fogging?
The limit values are defined by the respective OEM in the specifications. Typical: gravimetric ≤ 2 mg, reflectometric ≥ 60% residual gloss. Stricter values often apply to components near the windshield.
Your Fogging Testing in the ASO Laboratory
The ASO laboratory performs fogging testing according to all common OEM standards. Our DAkkS accreditation according to DIN EN ISO/IEC 17025 guarantees standard-compliant results.
Contact us for a quote – we will advise you on optimal sample planning and the scope of testing.