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Jan 1, 1500
Graphite deposits found in Borrowdale
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Period: Jan 1, 1500 to
Pencil
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Grphite 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
William Monroe in US invented a machine capable of making groves in wooden slats for making pencils. -
Factory is taken over
Greenwood family take over the pencil factory as payment for a bad debt. -
Cumberland Pencil Co.
Name of the company is changed to Cumberland Pencil Co. -
British Pens Ltd.
Company taken over by British Pens Ltd & start building the current factory. -
Pencil making factories
Four factories recorded in Keswick. -
Heavy metals in pencils
DES memo 2/65 set out limitations on use of heavy metals in pencils supplied to schools. -
Safety regulations
Pencil & Graphic Instruments Safety regulations - safety limit set on use of heavy metals in all pencils. -
Cumberland Graphics
Taken over by Twinlock and renamed Cumberland Graphics -
REXEL
Taken over by Rexel.
Development of Graphic & Studio ranges. -
American Brands
Rexel taken over by American Brands.
Cumberland Pencil Museum opens. -
Stetching and Drawing pencils
Developed Derwent Sketching & Drawing pencils -
Derwent Pastel Pencils
New softer Derwent Pastel Pencils are launched
