This document specifies test methods which are intended to determine the fogging characteristics of 

polyvinyl chloride (PVC) or polyurethane textiles that are used as trim materials in the interior of motor 

vehicles.

The methods can also be applied to fluid, paste, powdered or solid raw materials which are the basis for 

such trim materials or from which the materials are manufactured. The methods can also be applied to 

other materials and finished products.

The procedures are applicable to the measurement of fog condensate on glass surfaces within the limits of 

the test conditions. These tests do not or cannot measure accurately those cases in which:

 — the surface tension of the condensate is low, resulting in early coalescing into a thin transparent film;

 — the condensate is present in such a large quantity that the droplets coalesce and form a heavy oily/clear 

film (this heavy film gives false readings).

NOTE  In such cases, the gravimetric method is used.