Cosmetic Science Talk

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  • Sun care cream

    Posted by khoikhoa on November 15, 2017 at 8:32 am

    i am making sun care cream. I would like finish product have spf 30. I have somes UV raws like Ethylhexyl Methoxycinnamate,  Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Benzophenone-4, Titannium dioxide. Could you help me ratio of each raw that I have spf 30.

    Thanks so much

    Bill_Toge replied 5 years, 2 months ago 3 Members · 2 Replies
  • 2 Replies
  • David

    November 15, 2017 at 2:31 pm

    Contact e.g. BASF, and ask for starting formulations for SPF30

  • Microformulation

    November 15, 2017 at 4:14 pm
  • Bill_Toge

    November 15, 2017 at 7:40 pm

    there is no simple answer to this, simply because the SPF you achieve in practise depends on how efficiently your formula acts as a filter, which in turn depends on how the product flows under shear

    if you can get hold of them, try using encapsulated UV filters, as they take a few variables out of the equation and are supposedly more reliable and consistent