|Horizon (Photo credit: beapen)|
Nano particles of titanium dioxide and zinc oxide are being increasingly used in sunscreens. A thick layer of physical sunscreen can appear too white and bulky on the face to be cosmetically acceptable except for mean looking fast bowlers in cricket. However nano scale physical blockers will not scatter visible light nor aggregate in clumps thereby giving better cosmetic results while retaining efficacy. Miniaturization of these particles also increase their filtering capacity.
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