Home Cosmetic Science Talk Formulating General Refractive Indices

  • Refractive Indices

    Posted by chemist77 on November 23, 2016 at 6:52 am

    Hello everyone,

    I am formulating a clear product with a resin and 2 hydrophilic silicones. If I add glycerin to the formulation it is hazy but if I add monopropylene glycol the formulation gets clear after certain dosage. Does a small difference in refractive indices can produce such an effect?
    RI of glycerol is 1.473 while that of MPG is 1.431
    Or is it something else like the interaction of glycerin with the silicones in different manner.

    thank you 

    chemist77 replied 7 years, 4 months ago 3 Members · 3 Replies
  • 3 Replies
  • david

    Member
    November 23, 2016 at 12:15 pm

    Interesting question, but I wouldn’t put to much weight on refractive indexes in this case. There may be a correlation since refractive index is correlated to polarity which in turn is correlated to solubility which is correlated to transparency but hmm it is kind of complicated. I am a bit on thin ice here maybe somebody can fill in.

  • Dilfre

    Member
    November 26, 2016 at 1:10 pm

    light on this subject could be find here: https://en.wikipedia.org/wiki/Refractive_index

  • chemist77

    Member
    November 27, 2016 at 4:00 am

    Thank you, already on to it. 

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