IS 9690 : 1980 Method of test for determination of openness or fibrization of chrysotile asbestos fibre by air permeability method using Dyckerhoff apparatus

1 Scope

1.1 This standard covers the procedure for measuring therelative degree of openness or fiberization of milled chrysotileasbestos fibre by air permeability.

1.2 Samples containing excessive quantities of non-fibrousparticles or contaminants will not give reliable or meaningfulresults.

2 References

IS 2 :1960 Rules for rounding offnumerical values

IS 4844 : 1968 Methodof sampling and preparation of asbestos fibre forlaboratory test purposes