The apparatus includes a main conditioning chamber. It holds up to 4 x 400ml Pyrex beakers. Each individually heated and cooled to cause fogging of the specimen. The amount of fog is then measured with a standard 60° Gloss meter (Model CSI-21G).

Fogging test measures the tendency for plastic or elastomeric materials to volatize substances, which can condense and collect on other surfaces when in use. This test provides 2 methods for evaluating the likelihood of a material to leave a light scattering film on a glass surface (photometric method), or to deposit foreign material onto an aluminum foil surface (gravimetric method). The tests are used to evaluate materials to be used in automotive or other vehicle interiors.

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