Natural rubber latex as sold commercially is a colloidal dispersion of natural rubber
particles in water. It is concentrated so that the proportion of rubber is normally 60 %.
For LR 300 its contain about 58 - 60 % natural polyisoprene, 38 – 40 % of water,
0.2 - 0.6 % of ammonia and 0.1 - 0.5 % of KOH.