Historical
DIN EN ISO 3231:1998
Paints and varnishes - Determination of resistance to humid atmospheres containing sulfur dioxide (ISO 3231:1993); German version EN ISO 3231:1997
The docuement specifies a procedure for determining the resistance of a single coat film or a multi-coat system of paints or related products to humid atmospheres containing sulfur dioxide.
Deutsches Institut für Normung [din]