Home Cosmetic Science Talk Formulating How to make this shampoo completely transparent or opaque?

  • How to make this shampoo completely transparent or opaque?

    Posted by Abdullah on November 10, 2021 at 6:01 am

    In a Shampoo with SLES/SLS/CAPB/APG, with 0.2% guar Hydroxypropyltrimonium Chloride and 1% Amodimethicone macro emulsion (0.3% silicone) the product is not completely transparent and not completely opaque and in middle. Is these a way by adding something or changing to make this product completely transparent or opaque without changing these two conditioner in shampoo?

    Abdullah replied 2 years, 5 months ago 3 Members · 8 Replies
  • 8 Replies
  • Paprik

    Member
    November 10, 2021 at 7:19 am

    I guess you could try to solubilize the Amodimethicone prior to adding it?
    And add that in small increments and always wait until solution clears out. 

    I believe Amodimethicones are more suited for conditioners - o/w emulsions.

  • Abdullah

    Member
    November 10, 2021 at 7:56 am

    @Paprik it is already in solution of 30% Amodimethicone. Should i solubilize it in what? 

  • ketchito

    Member
    November 10, 2021 at 4:57 pm

    @Abdullah As you mentioned, your Amodimethicone is a macro emulsion, so unless you manage to create a micro emulsion on your own, you won’t be able to avoid that opaque look. You could switch to a Amodimethicone microemulsion though, or if you want to make the product completely opaque, you could add an opacifier. 

  • Abdullah

    Member
    November 11, 2021 at 1:54 am

    @ketchito how to create a micro emulsion by my own?

    Is there any cold process opacifir? 

  • ketchito

    Member
    November 11, 2021 at 12:51 pm

    @Abdullah To create a microemulsion, it depends on many factors, like the type of oils you’re using, surfactants that you can have access too, specific concentrations, etc. You can find some useful info in a very good book  “Microemulsions: properties and applications” (CRC Press).

    Regarding opacifiers, the easiest ones are styrene/acrylates opacifiers (like Dow’s Opulyn). You also have the distearate based, but you’ll need a suspending agent to prevent sedimentation. You can work with both in cold process. 

  • Abdullah

    Member
    November 11, 2021 at 2:15 pm

    @ketchito do we need suspending agent for styrene/acrylates? 

    And is the common emulsions (lotion and cream) macro emulsion or micro emulsion? 

  • ketchito

    Member
    November 12, 2021 at 1:10 pm

    @Abdullah Styrene/acrylates opacifiers don’t require suspending agents. 

    Common emulsion are macroemulsions (that’s why they are white; microemulsions are transparent). 

  • Abdullah

    Member
    November 12, 2021 at 2:23 pm

    ketchito said:

    @Abdullah Styrene/acrylates opacifiers don’t require suspending agents. 

    Common emulsion are macroemulsions (that’s why they are white; microemulsions are transparent). 

    Thanks 😊

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