• Formulating

  SPF

  Posted by Vin on January 30, 2015 at 6:11 am

  I’d sent a same formula for SPF in vitro test to 2 lab based on COLIPA and FDA method respectively. The result of the SPF value are almost 3 times higher for the report based on FDA method.

  May I know how to convert the SPF value for both method vice versa?

  Thank you.

  Bobzchemist replied 9 years, 11 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Bobzchemist

  Member

  January 30, 2015 at 3:13 pm

  There is no conversion possible. They are two seperate methods, and the results do not correlate.

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