PH 39 (COSMETICS): is representative, have some unique properties, although this is a very traditional waterin-oil emulsion type of formula

Such an emulsion is quite stable until rubbed
briskly, when it breaks, giving rise to freed droplets
of water.

Question

is representative, have some unique properties, although this is a very traditional waterin-oil emulsion type of formula

Such an emulsion is quite stable until rubbed 
briskly, when it breaks, giving rise to freed droplets 
of water.

LEIGHTON DWIGHT OBILLOS · Accepted Answer

Formula IX

Is representative, have some unique properties, although this is a very traditional waterin-oil emulsion type of formula Such an emulsion is quite stable until rubbed briskly, when it breaks, giving rise to freed droplets of water.