A uv silicone wristband can transfer its color darker under sunshine when absorbing uv light. It is not only with good looking appearance but also indicating the strength of the uv index.
So some uv silicone bracelets made as the indication with the ruler of levels of index. Wearing on the wrist to avoid long time staying under strong uv.
So what makes it uv transfer ? The answer is the UV phosphor which usd uv energy to open the sensitive molecular bond and make it jump from low energy to high energy level
There will be a change from visible light to visible light, resulting in the changing color from light to dark.
It become a uv silicone bracelet when the UV phosphor is put into the silicone mass and produce it a band.
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