The disposable wristband that can tell you when to get out of the sun
A paper wrist strap similar to the bands worn at festivals can help prevent over-exposure to the sun and reduce the risk of cancer.
The device lets people know when they have been exposed to a certain amount of UV (ultra-violet) radiation by changing colour.The monitor works by changing colour from yellow to pink as the strength of UV radiation increases.
It operates through an acid-release agent which picks up ultraviolet light and a dye which responds to pH levels in the indicator.
The agent is decomposed by sunlight, leading to the rapid change in colour.
The wristbands will be tailored to different skin types to reflect the different tolerance levels that people have to the sun.
For example, a wristband for someone with fair hair and light skin will change colour quicker than a band for someone with dark hair and dark skin.
The technology will be commercialised by Swedish-based company Intellego Technologies, established by Swedish entrepreneur Claes Lindahl.
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