• Formulating

  Serum dries up with a layer?

  Posted by yesunyi on November 28, 2020 at 10:14 am

  I have been trying to formulate a face serum with ingredient percentage as below:

  water ~88%
  1,3-butylene glycol 8 %
  xanthan gum 0.3%
  sodium HA 0.1%
  allantoin 0.15%
  glycerin 2%
  hydroxyethylcellulose 0.3%
  sodium benzoate 0.3%
  potassium sorbate 0.15%
  & other liquid extracts 

  However when i applied it on skin, after about 30 minutes, it forms a slightly opaque gum layer like after a glue dries up…what’s wrong with my formula? Would adding more of glycerin help with this?

  MarkBroussard replied 3 years, 10 months ago 4 Members · 4 Replies
• 4 Replies

• 

  Paprik

  Member

  November 29, 2020 at 6:05 pm

  Hello,

  I’m not sure, but maybe the combination of XG and HEC? 
  I usually don’t use these in serums. I simply thicken it with higher input of HA. 

• 

  jemolian

  Member

  November 30, 2020 at 12:31 am

  Perhaps try only using one of the gum in a test and see if that’s the issue. 

• 

  yesunyi

  Member

  December 2, 2020 at 11:01 am

  thanks guys, its probably the gum. i’ll make some adjustment. thanks 

• 

  MarkBroussard

  Member

  December 2, 2020 at 3:16 pm

  What Molecular Weight HA are you using?  If it’s a white film, it’s probably the HA.  Q: Why are you using both HEC and Xanthan Gum? … you only need one of them.

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