This includes mechanical and instrumental evaluations - bar hardness,
smear, mush, lather volume, whiteness, translucency, Lab colour, sandiness,
efflorescence, wet and dry cracking. These are a group of test used to simulate
of quality test of the final product for benchmarking purposes. A person of ordinary
skill in the finishing process would better appreciate results from these tests.
It is usually accomplished by controlled testing conditions and involves mechanical
or physical tests. The biggest advantage of this test over other performance test is
its quantitative nature that and can be used for benchmarking. It can answer questions
like - which of the bar has higher foam volume.
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