The test device enables the evaluation of heat transfer properties of clothing material used for protective clothing for protection against heat and flames.

In this test method a heating cylinder is brought into con­ tact with a sample of the clothing material to be tested. The heating cylinder is heated to the respective contact temperature and maintained at this temperature. A sample of the material to be tested is placed on the calorimeter. Then the calorimeter together with the material sample is moved at a constant speed towards the heating cylinder.

A temperature curve is recorded by the calorimeter. The threshold time is determined from the temperature curve of the calorimeter.