Emulsion may be defined in a number of ways, but essentially, they are “heterogeneous system, usually containing two immiscible liquids”.
|TYPE OF TESTS||W/O||O/W|
|A. Dye solubility Test||Amaranth green (-)
Sudan red (+)
|B. UV Flourescence Test||(+) absorption||(-)|
|D. Cobalt Chloride Test||Blue||Pink|
|E. Direction of Creaming||Sedimentation||Creaming|
Addition of gum to oil (mixing lightly to disperse), followed by adding all water and stir continuously & vigorously. Continuous trituration for further 2-3 minutes to produce white stable emulsion.
— The whiter the product, the smaller the globules. Other ingredients should be added gradually up to its final volume.
Water is added to the gum and quickly triturated until gum has dissolved, to make mucilage. Oil is then added to mucilage in small proportions, triturating after each addition, until a thick primary emulsion is obtained.