Field NR latex (NRL) contains hydrocarbon (1,4-cis polyisoprene) and non-rubber component constituting mainly carbohydrates, proteins and lipids in an aqueous serum phase [1-4]. Fresh NR latex are spontaneous coagulation and purefaction of NR latex occurring shortly after it leaves the tree, high ammonia (HA) of the latex is necessary to preservation. In latex concentrate, ammonia is clarified main preservative in both field latex and concentrated latex. Ammonia solution can inhibit bacteria action arising from high pH condition, hydrolyze fatty acid esters and in process form soaps that act as stabilizing bodies for the dispersed system [1].