Unsupported browser

You are using an outdated browser. Please upgrade your browser to improve your experience.

Sign up for
an Award

Participate with your entry in one of our professional or student awards.

Sign up for an award

Sign up for
a Profile

Create your own profile and publish it in the iF WORLD DESIGN GUIDE.

Sign up for a profile

Learn more:

iF SOCIAL IMPACT PRIZE
(free of charge)

Present your project for free and win your share of EUR 50,000 in prize money.

Publish your project

Time for Change / Toothbrush

Time for Change
Time for Change

Time for Change toothbrush uses a special ink to remind people to change their toothbrushes regularly. This kind of ink will fade gradually with the passage of time and disappear entirely at last. When a toothbrush is needed to replace, the text on the toothbrush handle will become “change”, people know it’s time to change their toothbrush apparently.

University

Zhejiang University

Zhejiang University
Ningbo, China

Yu Liang,
Zhejiang University