Uses Dammar_gum

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^ william theodore brannt (1893). varnishes, lacquers, printing inks , sealing-waxes: raw materials , manufacture. h.c. baird & co. p. 168. 
^ mayer, ralph (1991). artist s handbook of materials , techniques (5th ed.). viking adult. isbn 0-670-83701-6. 
^ burger, p.; charrié-duhaut, a.; connan, j.; flecker, m.j.; albrecht, p. archaeological resinous samples asian wrecks: taxonomic characterization gc–ms. analytica chimica acta. 2009, 648, 85-97. doi:10.1016/j.aca.2009.06.022






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