Everyone is aware that the chemical goes back to nazi scientists in ww2 era.
Zno's advance and advantage lies in shelf life of the product and in their formula's ability to stay on the skin.
They have chosen to keep these as trade secrets rather than patent them.
Any info on other company's performance in these areas? We know anyone can get the basic chemical.
Ann: Quarterly Update and Appendix 4C, page-23
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