The carbon-carbon double bonds in fatty acids, thus their degree of unsaturation, can be exploited through a series of chemical reactions to insert functional groups and transform them into a 3D printable resin compound. As previously reported for soybean oil, the raw material can be epoxidized, with epoxide rings introduced on the alkene bonds . Using the high reactivity of the epoxide rings, methacrylate groups can be then inserted in by a methacrylation reaction . The final methacrylated compounds can be used to formulate a photo-curable resin consisting mainly of sustainable bio-materials.