pontianac

plural pontianacs · alternative pontianak

1. countableuncountableA fossil resin historically used in the production of some rubber, produced from the latex of Dyera costulata.

   If the acetone extract is brittle, the presence of a resin is indicated. It may be either rosin, coumarone resin or pontianac resin.

   1937, Carroll Campbell Davis, John Twiss Blake, The Chemistry and Technology of Rubber, page 857

   3 more examples

   A firm of manufacturers to whom a sample of the Galactodendron latex was submitted considered that the material could be used in the rubber industry as a substitute for pontianac.

   1919, Bulletin of the Imperial Institute - Volume 17, page 295

   Some fifteen years ago enterprising technologists found that the rubber in pontianac was a very satisfactory material from the commercial standpoint, so much so that its extraction from the pontianac by deresination would be commercially sound, in view of the then obtaining price of crude rubber, provided an efficient method of extraction could be developed.

   1926, Lothar E. Weber, The Chemistry of Rubber Manufacture, page 22

   Glycerol, partially esterified with abietic acid is preferred although glycerol, etc., esterified with rosin, Congo, manila, the pontianacs, the shellacs, kauri, copal or other fossil resins may be used.

   1930, Rosin in Synthetic Resins, page 48

   Synonyms: dead Borneo, gutta jelutong, gambria, jelutong, bresk, fluvia

1. obsoleteAn older spelling of Pontianak city in West Kalimantan (Indonesia).