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Grindstone / pencil sharpener

Grindstone
Grindstone

When we use a pencil ,20%-50% of the lead is wasted due to the conventional way we sharpen it. Waste of pencils lead to more timber consumption, which means more serious environmental problems . So, we designed the pencil sharpener named “Grindstone”, whose blade surface is rough as abrasives, to solve the problem that can not be ignored.
When the lead is not sharp enough, we turn the pencil to sharpen it immediately in the conventional way ,causing a huge waste of lead and wood.
With Grindstone , users can grind the pencil lead first to sharpen it. A pencil can be used for longer and more forests can be preserved in that way.

University

Wuhan University of Technology

Wuhan University of Technology
Wuhan, China

Design

Wuhan University of Technology

Wuhan University of Technology
Wuhan, China

Huang Yao; Fan guangrui; Guan Xiaolei; Wang Zhihua