Abstract
Latex is a white, milky liquid that comes out of injured plants from the Hevea brasiliensi plant. Hevea brasiliensi latex can be processed into rubber because it has good properties which contain rubber particles in the form of poly isopropene hydrocarbons which are the main components of rubber. In this study, latex coagulation used an organic coagulant as a latex coagulant, namely extract from pineapple fruit and liquid smoke from rubber wood, oil palm midrib, coconut shell. The results of coagulation were measured by the quality of dry rubber content (KKK) and PRI. Supported by secondary data, namely literature taken from journals and browsing on the internet. The results showed that the best coagulant material was produced by pineapple extract 80%, liquid smoke of coconut shell with a pH of 4.1, liquid smoke of palm fronds with a pH of 3.2, and liquid smoke of rubber wood with a pH of 2.6.
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