Humidity chamber test - appendix

A chamber with a controlled temperature of 85-90°F and a relative humidity (RH) of 90-95% is used. This tropical room simulates a severe environment that would be expected to be ideal for the cultivation of fungi. 

The method MIL-8lOE Methods 508 (MIL-STD, 1989) was adopted by the military years ago for the evaluation of plastic materials including PVC, polyurethane etc. as well as natural materials for attack and growth of fungi. 

After incubation of 28 to 84 days, the materials are evaluated for surface fungal growth. Additional properties can be measured such as hardness, stiffness, breaking strength, and electrical properties. 

See photographs below of athletic shoe samples after exposure. 

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