Dry Gum Method 

This method is often used to make the initial or primary emulsion out of oil, water, and a hydrocolloid or “gum” emulsifier (usually an acacia).

PROCEDURE 

(a) Measure the required quantity of oil in a dry measure and transfer it in to a dry mortar. 

(b) Add the calculated quantity of gum acacia in to it and triturate rapidly so as to form a uniform mixture. 

(c) Add required quantity of water and triturate vigorously till a clicking sound is produced and product becomes white or nearly white . The emulsion produced at this stage is known as ‘ Primary emulsion’ . 

(d) Add more water to produce required volume

The following table shows the proportion of oil , water and gum acacia required:-






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