Home Cosmetic Science Talk Formulating Shampoo formulation & manufacturing techniques

  • Shampoo formulation & manufacturing techniques

    Posted by pnrrsky on March 29, 2024 at 6:15 am

    Hi I need help, I’m a beginner in formulation, here is the shampoo formula (oil/water) I’m trying to make, *attached.

    The problem is that the results of the shampoo seem to be less homogeneous & evenly dispersed, there are still gel grains that won’t dissolve (my guess is that it’s in the Na-CMC (which doesn’t expand enough) / SLS (less soluble), because the water to treat both is limited). And the phase (oil-water-thickener) separated after leaving it for 1 night.

    Is there any corrections to the formulation or input on special methods regarding mixing the ingredients? I lack reading sources regarding the technicalities of combining these ingredients.

    *notes :

    1. CDEA & APG surfactants are part of the comparison in the formulation.
    2. The problematic formulation results are the CDEA variations which experience separation/are not evenly dispersed. The results formula with CDEA are not as thick as the formula with APG.

    Sorry for my bad english grammar…

    ketchito replied 2 weeks ago 5 Members · 11 Replies
  • 11 Replies
  • ketchito

    Member
    April 1, 2024 at 6:59 am

    That’s a very unbalanced formula. Also, shampoos are not emulsions (you barely have any oli in there to call it O/W). First, remove your extract and your propylene glycol. Specially the last one might not let you thicken your product, and perhaps that’s why you had to add so much thickener (3% is very unusual…you might require something around 0.5%-1%). Replace your oil for a conditioning agent (like Guar HPTC) and use more CAPB to thicken and less CDEA. Also, make sure you have a very robust preservative system.

    • Fekher

      Member
      April 1, 2024 at 11:22 am

      @ketchito this combination of parabens is not robust?

    • pnrrsky

      Member
      April 6, 2024 at 12:47 am

      Thank you for the advice. I want to ask again. If I save/retain these ingredients in the formulation, are there any other suggestions for changing the concentration of the ingredients to balance and approximate the shampoo dosage form? The reason is, all these ingredients were entrusted to me to test whether they could be used to make shampoo formulations by someone

    • pnrrsky

      Member
      April 6, 2024 at 12:57 am

      Regarding propylene glycol, is the concentration too much, so that it affects the Na-cmc which does not want to be distributed/dispersed when the ingredients are mixed (small lumps, separate)?

  • ketchito

    Member
    April 1, 2024 at 11:57 pm

    Not sure it’d be enough against gram negative bacteria, but I believe @PhilGeis will have a better opinion.

    • PhilGeis

      Member
      April 2, 2024 at 3:43 am

      No, ketchito is right. Appreciate that parabens are being considered but will not be enough in this context. Suggest addition of formaldehyde releaser like Germall or Glydant or an isothiazolinone like Kathon CG.

      • Abdullah

        Member
        April 2, 2024 at 4:08 am

        @philgies Is that enough only for fungi if used with 0.5-1% phenoxyethanol in an emulsion, not shampoo?

        • This reply was modified 2 weeks, 6 days ago by  Abdullah.
        • PhilGeis

          Member
          April 2, 2024 at 4:11 am

          Seems reasonable - need to confirm with appropriate testing.

  • Fekher

    Member
    April 2, 2024 at 11:27 am

    @PhilGeis for hair wax which need 80 degree C will better using parabens with Phenoxyethanol (I read that phenoxyethanol is descativated with high ethoxylated) or parabens with kathon cg (I guess kathon cg can’t added in 80 degree C)? Have you better suggestions if no one is good system of preservation for hair wax with 30% ceteareth

    • PhilGeis

      Member
      April 2, 2024 at 1:01 pm

      The thought for a shampoo. Do not use Kathon in leave on product like hair wax. What is formula - esp how much water

  • ketchito

    Member
    April 8, 2024 at 8:35 am

    You have lumps dispersing CMC because you’re adding too much. Start with 0.5% of CMC and only 1% of PG, drop your extract to 0.1%, switch the levels of CAPG and APG, and add CDEA as final ingredient. You’ll notice you’ll need less CDEA.

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