Forum Replies Created

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  • Kirk

    Member
    May 31, 2021 at 7:57 am in reply to: Gliding Effect of Emulsion Despite High Viscosity??

    Does the emulsion break down when you pick it up with your hand/finger?

  • Kirk

    Member
    September 16, 2016 at 1:50 am in reply to: Quest for the Missing Salicylic Acid

    I agree with Bob and John. I think some of your salicylic acid is converted to sodium salicylate by the addition of sodium hydroxide. 

    You can validate this by testing your production batch samples for salicylic acid and sodium salicylate. Compare the results and see if the results would add up.

  • Kirk

    Member
    August 26, 2016 at 7:21 am in reply to: Batch Manufacturing Records

    using pencils to record data in GMP documents (such as batch manufacturing records) are a no-no if you will look at Good Documentation Practices. one can easily alter the records if data is recorded using a pencil, compared to a pen.

     

  • Kirk

    Member
    August 23, 2016 at 8:42 am in reply to: Knowing or Choosing the right Preservative for our product

    I agree with Cris. Check the preservatives that she mentioned if it will fit in your formula. Then do the necessary tests (stability, challenge tests, etc.) just to be sure.

  • Kirk

    Member
    August 23, 2016 at 8:38 am in reply to: Term for Whitening during Rub-In of Lotions?

    What’s the INCI name of that emulsifier?

  • Kirk

    Member
    August 23, 2016 at 2:26 am in reply to: Term for Whitening during Rub-In of Lotions?

    You are experiencing Soaping Effect. This is usually observed when you are using emulsifiers such as glyceryl stearate. What emulsifiers are you using anyway?

  • Kirk

    Member
    April 1, 2016 at 1:10 am in reply to: Cleansing Gel

    Sodium hydroxide could have been used to neutralize the Carbomer in the product. But to be sure, could you post the list of ingredients of Effeclar’s Cleansing Gel? 

  • Kirk

    Member
    February 24, 2016 at 8:37 am in reply to: Safety of Talc in cosmetics.

    Based from the news, J&J powder was used in the genital area, which the US jury who heard the case, used as correlation to ovarian cancer.

  • Kirk

    Member
    December 28, 2015 at 12:28 am in reply to: Organic surfactant compatible with low pH (3.5)?

    Or you can try Organic Soapnut Extract. 

  • Kirk

    Member
    December 23, 2015 at 7:38 am in reply to: Overmixed Shampoo - How to Save Batch

    Working under vacuum is possible, if your mixing tank is equipped with a vacuum system. I have validated production runs of shampoo, body wash, and facial wash on mixing tanks that have vacuum system. 

  • Kirk

    Member
    December 19, 2015 at 12:18 am in reply to: Looking For Good Experienced Career Advice

    If you are eyeing for a managerial position, then MBA is the way to go. 

  • Kirk

    Member
    December 16, 2015 at 3:50 am in reply to: Shampoo

    Maybe its a pearlizer? Like ethylene glycol distearate. 

    Well, we could only guess what that Uberlan is.
  • Kirk

    Member
    December 15, 2015 at 7:58 am in reply to: When to disclose formula %

    Some suppliers, especially fragrance suppliers, do disclose their formula. But they disclose it directly to the government agency or regulatory body that requires the quantitative formula. Maybe you can try that. And tell the regulatory authority that the registration you are filing for is for your client.

  • Kirk

    Member
    December 10, 2015 at 2:20 am in reply to: Product darkening

    or you can use the Henderson-Hasselbach Equation to compute the amount of citric acid and sodium citrate that you need to use at a specific pH.

  • Kirk

    Member
    November 26, 2015 at 9:13 am in reply to: glucoside allergies

    @Belassi,

    I think you are referring to Eumulgin VL 75. This material is composed of lauryl glucoside, polyglyceryl-2-dipolyhydroxystearate and glycerin. I can’t speak for the safety of this raw material. For Decyl Glucoside,I did not encounter any allergic reaction on myself, as well as the panelists who tested samples of our products with relatively high amount of Decyl Glucoside (~5.00%).

    With Lamesoft PO 65, I am also quite familiar with that material. May I know the dosage that you used in the body shampoo? I haven’t tried using it at more than 1%. Because that was the recommended dosage according to the supplier.

  • Kirk

    Member
    August 7, 2015 at 9:34 am in reply to: Making Deodarant

    Hi @Bobzchemist!

    I have tried making a prototype of deodorant stick using the method that you mentioned. It worked well.
    The deodorant stick that I made have the right hardness and the feel was non sticky.
    Thank you for the wonderful advice.
  • Kirk

    Member
    May 11, 2015 at 3:39 am in reply to: Cosmecoil KD-S Pongamia Glabra Seed Oil

    This is karanja oil, right?

  • Kirk

    Member
    April 30, 2015 at 8:25 am in reply to: Konjac root powder

    Did you try to heat it while mixing? Maybe its worth a try.

    BTW: where did you source your konjac gum? I would like to try it at our lab. 
  • Kirk

    Member
    April 24, 2015 at 1:31 am in reply to: Shampoo CMC with no salt

    Try Xanthan Gum and Guar Gum.

  • Kirk

    Member
    March 4, 2015 at 2:41 am in reply to: Separation testing

    You can also use a centrifuge to see if separation will occur. This is specially useful for conditioners (rinse off and leave on)

  • Kirk

    Member
    February 19, 2015 at 1:20 am in reply to: Gentle ingredients to mask scent?

    Try Unistab S69 by Induchem. It’s an effective odor corrector but just check it for sensitivity issues.

  • Kirk

    Member
    February 18, 2015 at 2:39 am in reply to: R&D Cosmetic SOPs

    Hi @ValChemistLB. Check this link: http://www.asean.org/communities/asean-economic-community/item/asean-cosmetic-good-manufacturing-practice-gmp-training-modules-no-1-to-no-13

    One of these modules is about documentation. It can serve as a guide to help you in writing those SOPS. 
  • Kirk

    Member
    February 12, 2015 at 1:59 am in reply to: Menthyl Acetate: a use for it?

    Its an ester acetate of menthol. So most likely it will not smell the same as menthol, but will give a certain cooling effect, to some extent. You can try to use in water based products such as toners and body washes.  

  • Kirk

    Member
    January 23, 2015 at 1:53 am in reply to: INCI “natural” aromas

    The supplier will not disclose the full info to you as the complete ingredient list of their product is a “trade secret”. You can try signing a non-disclosure agreement with them if you really want to pursue getting the ingredient list.

  • Kirk

    Member
    January 22, 2015 at 5:58 am in reply to: Improving my anti-acne gel.

    Have you also tried Tea Tree Oil for your anti acne gel?

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