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What is the definition of NANO size?

Hello, What is the range for particle sizing please? When does a product become NANO in size? And what is the size of your particles in you rcreams. I don't understand your chart. Thank you

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Jun 26, 2016
 Nano size in Sunumbra Sunscreens
by: Sue

Thanks very much for this query. I will update the content on the zinc oxide link on the site.

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