Difference between revisions of "Penetration Test"
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Revision as of 11:11, 9 April 2013
The penetration test is the measures of the depth to which a needle with a definite top load penetrates the wax sample. Where the conditions of test are not specifically mentioned, the load, time, and temperature are understood to be 100 g, 5 sec, 25° respectively, and the units of penetration to indicate tenths of a millimeter. The penetration test is particularly well adapted for microcrystalline waxes, and is more reliable than the durometer test in determining hardness [1]. A hard wax has a low penetration, whereas a soft wax has a high penetration.
Methods
This test provides an estimate of the consistency of waxes and their molecular characteristics. It has been reported that the needle penetration on paraffin waxes increases with the increase of iso-and cyclo-paraffin.- ↑ Warth, A. H.; The Chemistry and Technology of Waxes. Reinhold Publishing Corporation. Second Edition, p. 612 – 614