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Topical Nail Hardener



Published October 7, 2008
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Patent No. US. 7,416,720 B2
A nail hardener that decreases brittleness and increases strength has been patented by Morteza Hajirahimy of Tehran, Iran. The topical aqueous composition consists of 20% glycerin, 17% water, 3% propylene glycol and 60% ethanol.


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