Colour-change wristbands can track your sun exposure

A new single-use, disposable wristband that can be printed using a UV active ink that changes colour when exposed to different types of UV rays has been developed by RMIT researchers.

When the wristband is exposed to sunlight, the sensor lights up with four smiley faces. The wearer is warned it is time to get out of the sun when the fourth sad smiley appears, as they have reached their maximum allowed daily UV dose.

While we all need some sun exposure to ensure we maintain healthy levels of Vitamin D, excessive exposure can be detrimental, causing sunburn, skin cancer and premature signs of ageing.

Professor Vipul Bansal from RMIT University used his personal struggle with Vitamin D deficiency to develop the sensors which can be printed onto any paper-like surface such as wristbands, headbands and stickers. The sensors come in six variations to reflect skin tonality. The colour produced by the sensor indicates when 25 per cent, 50 per cent, 75 per cent and 100 per cent of the daily recommended UV exposure has been reached.

Would you use this product to monitor your exposure to harmful UV rays? Are you cautious about how much time you spend in the sun? Do you know if you are getting enough vitamin D?

Written by Andrea

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