Need help with color changing clay mask

Hi all, 
I'm working on a color-changing mask and I need some assistance. What do you think is the ingredient to use to get the color-changing effect? I tried using encapsulated vitamin C, thinking that it would help with the color-changing but no luck. I don't want to use a color-changing pigment because of its composition. Any help would be greatly appreciated. 
Thank you.

Comments

  • I think the typically ingredient would be pigments. There are encapsulated colors that change (see Sanddream Dreamcolors white to pink, white to green, etc) If you can find a benchmark product that changes color without this then we can look through the LOI. you could try  something that changes color based on pH?
  • Thank you @EVchem
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