PLTW-Pencils

By LoganMarioSteck
  • Graphite Deposits Found
    Jan 1, 1500

    Graphite Deposits Found

  • Graphite is no longer unique.

    Graphite is no longer unique.

    Unable to get graphite from England because of the war, Conté in Paris produces artificial graphite. Borrowdale Graphite is no longer unique.
  • Pencil Making Machine

    Pencil Making Machine

    William Monroe in US invented a machine capable of making groves in wooden slats for making pencils.
  • Factory is taken over

    Factory is taken over

    Greenwood family take over the pencil factory as payment for a bad debt.
  • Cumberland Pencil Co.

    Cumberland Pencil Co.

    Name of the company is changed to Cumberland Pencil Co.
  • British pens

    British pens

    Company taken over by British Pens Ltd & start building the current factory.
  • Pencil making factories

    Pencil making factories

    Four factories recorded in Keswick.
  • Heavy metals in pencils

    Heavy metals in pencils

    DES memo 2/65 set out limitations on use of heavy metals in pencils supplied to schools.
  • Stetching and Drawing pencils

    Stetching and Drawing pencils

    Developed Derwent Sketching & Drawing pencils
  • Derwent Pastel Pencils

    Derwent Pastel Pencils

    New softer Derwent Pastel Pencils are launched