1. Introduction
Natural rubber (NR) latex from Hevea brasiliensis trees is usually coagulated by acid to prepare the sheets for the production process. In this acid coagulation process, the negative charge of the phospholipid–protein complex on the surface of colloidal NR particles [1] was neutralized by the positive charge of the acid hydrogen ions. The commercial acids used for this purpose are formic and acetic acids. Since these acids are petrochemicals, an alternative, more sustainable materials are on high demand with rising petrol prices. In this study, wood vinegar, an acid by-product of wood charcoal production, was investigated as a coagulant in the production of NR sheets and compared with formic and acetic acids.