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EXERCISE 8

EVOLUTION OF THE PENCIL
SHARPENER

Razor Knife Blade Manual Sharpener

Early 1800s: At first, pencils were sharpened 1828: French mathematician Bernard Lassi-
with a sharp razor knife blade. this was not monne invented and later received a patent
only redundant due to the blade being flat, but for the first manual pencil sharpener. Though
was deemed dangerous for schoolchildren. the design was more convenient with multiple
blades in a wooden block, Thierry des Estivaux
improved the design with a single blade.

Rotary Sharpener Electric Sharperner
1896: The rotary pencil sharpener was invented Early and Late 1910s: First electric pencil sharp-
after various input from users who wanted their ener was invented by Samuel Forrester. A comm-
pencils held in place and the turning of the pen- ericialized item was manufactured by Farnham
cil, and sharperner to be steady. The sharpener Printing & Stationery Co. seven years later.
was invented by A.B. Dick, who later received
a patent.

The last version of this poster consists of
changing the gradient background color to
yellow-green and red-purple, in order to make
it attract elementary school children who look
upon this poster.
ROYAL TRIBUNE | 21
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