• Formulating

  pigment cplor is fading

  Posted by cherri on April 17, 2014 at 11:10 am

  Hi,

  I am making a product very light watery serum type for face and the ph around 5-6 and using a blue pigment which contains below ingredient:

  Mica, Titanium dioxide, Tin oxide, and Ferric ferrocyanide

  It seems like the color is fading at elevated temperature. Any suggestion?

  Thank you for your help!

  Chemist77 replied 10 years, 7 months ago 2 Members · 3 Replies
• 3 Replies

• 

  Chemist77

  Member

  April 17, 2014 at 12:07 pm

  well pretty clear that your blue ferrocyanide aint stable at higher temperatures, either use a different grade or a color stabilizing agent.

• 

  cherri

  Member

  April 17, 2014 at 5:25 pm

  is this related to my final ph? thanks!

• 

  Chemist77

  Member

  April 18, 2014 at 3:32 am

  That might be one of the factors too, check the TDS to check the optimum pH for ferrocyanide.

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