IProduction of natural rubber Today, South east asia is the main source of natural rubber, accounting for about 90% of output, and the second is Central Africa. The strain of para tree in south east asia is Hevea brasiliensis. The latex ,is from para tree, is called field latex. The field latex is small circle that spread in emulsion, white luquid and is a colloid state. The field latex has a quantity of small rigid about 30-40 % , pH 6.5-7 , density about 0.975-0.980 gram per milliliter,viscous 12-15 centipoint. The combination of latex is divided to 2 parts