I have a range of eye shadows (24) that are declined into various shades. The base formula is the same with only the percentage of colorants differing. My question is, for RIPT and In-Vitro EpiOcular testing can the group of eye colors be equally composited into one sample for testing? Or is it recommended to only test one eye shadow out of the group, perhaps the eye color with the most concentrated pigment? Or should each individual eye shadow be tested, which is rather expensive.

Thank you for your help


  • BobzchemistBobzchemist Member, PCF student
    In the past, I have made a composite formula, using the maximum amount of every pigment in a group of shades, and used it for RIPT testing. This was for the US - I don't know if it would be OK in the EU.
    Robert Zonis, Sr. Formulation Chemist, Beaumont Products "All opinions and comments expressed are my own, have no relation to Beaumont Products, are fully copyrighted, and may not be used without written permission."
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