(1) It is easy to produce copious foam rapidly
(2) It causes hair swelling and softening.
(3) It must be free from possibility of causing skin irritation,
Especially to the mucous membrane of eye, nose etc.
(4)It produces stable foam for shave.
(5)It should not cause rusting or dulling of razor blade
(6)It must produce a smooth oily layer on the face to glide the blade or razor easily and painlessly.
(7)It should cause, rapid softening of the beard and should produce sufficient viscosity to hold the hair erect to facilitate cutting of the individual hairs.
(8)The stability should be adequate at various temperatures with geographically different areas.
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