Phenol-formaldehyde Plastic, also known as PF, or Phenolic, has been mass-produced since 1909.
-	It is a thermoset polycondensate.
-	Applications: The first volume-produced synthesized polymer resin, PF was used in early consumer electronic products such as telephones and radios.
-	General properties: A naturally brittle material in pure form, it is able to be strengthened with fillers such as wood pulp and cellulose.
-	Trade Name: Bakelite.