Burning Test H

4 The 500g burning test (H) The classification test for The Fire Service Law for Class 1 substances 

This test is applied for substances whose particles do not pass through the 2 mm standard sieve. 

This test is to determine the tendency of a slid substances to increase the burning rate of a combustible substance with which it is mixed. In this test the burning time of a mixture of the material to be tested and a combustible substance is compared to a mixture of a standard and the same combustible substance. 

The standard is JIS superior quality reagent potassium perchlorate of particle size between the 300 ju m (about 50 mesh) and 150 ju m (about 100 mesh). The standard is kept at least 24 hours at room temprature in a desicator containing dried silica gel. 

The combustible substance is a sawdust from a tree with a low resin level. The particle 

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