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This is a kind of pen that characterized by
its tricolor ink combination. The owner can
adjust the color as they like. This design will
help people to know about the sources of
color in a more convinient and quicker way.
It is better than the traditional one , which
only contains one color per pen and will be
thrown away after being used up. Besides,
using the traditional pen is not enviromental
friendly or easy to carry .
Guangdong University of Technology
Guangzhou, China
Yinghua Yin,
Guangdong University of Technology
LIANGZHAO LIN,
Guangdong University of Technology
Ying Yang,
Guangdong University of Technology