vulcanisates. Thus some text books give the meaning of elastomer to vulcanized product [2]. Normally, the flesh latex from para-rubber trees composes of rubber content from 20% up to 45% (depends on many factors), non-rubber components around 5% and the rest is water. In order to transport the latex to the factories, the latex is concentrated for saving the transportation cost. The preferred level of concentration is 60% and it is so-called concentrated latex. Using of concentrated latex makes the products to have the regular quality when compared to that with flesh latex. This is because the non-rubber components are separated during concentration process. There are four processes for producing the concentrated latex; evaporation, creaming, electro decantation and centrifuging. The method of centrifuging is used widely in economic scale (around 90% of total production of concentrated latex) [3]. The quality of concentrated latex is depended on the quality of flesh latex, thus some properties of flesh latex must be examined and controlled [4].