Forum Replies Created

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  • Fekher

    Professional Chemist / Formulator
    July 26, 2025 at 1:22 pm in reply to: Comment my filters combinaison

    Verifying the solubility of EHT and tunisorb S it will be a problem in dissolving them.

  • Fekher

    Professional Chemist / Formulator
    July 18, 2025 at 2:50 pm in reply to: Comment my filters combinaison

    I should collect maximum of details, especially the opinions of experts then move to trying

  • Fekher

    Professional Chemist / Formulator
    July 18, 2025 at 9:38 am in reply to: Comment my filters combinaison
  • Fekher

    Professional Chemist / Formulator
    July 17, 2025 at 5:56 pm in reply to: Sunscreen SPF 50

    Even your SPF will be low as predicted will not may reach 30.

  • Fekher

    Professional Chemist / Formulator
    July 8, 2025 at 10:48 pm in reply to: Guidance in w/o emulsion
  • Fekher

    Professional Chemist / Formulator
    June 28, 2025 at 4:11 am in reply to: Sunscreen SPF 50

    Formulation seems quite good just may:
    1*Three uv filters will not protect as well if they are more ( i know that yours are broad spectrum however all sun screen seen contain more then three filters)
    2* Oil phase is more then 40 % so it is really not easy to have stable emulsion .
    3* Even with Sepinov EMT 10-0.8 Sepimax , Zen- 0.1 the level of Olivem 1000-1 ,Peg 100 stearate & Glyceryl stearate- 2 seems low .

    • This reply was modified 4 weeks ago by  Fekher.
  • Fekher

    Professional Chemist / Formulator
    June 11, 2025 at 7:51 am in reply to: EDTA

    @mmarr i never recived complaining from EDAT in such level .

  • Fekher

    Professional Chemist / Formulator
    May 17, 2025 at 4:14 pm in reply to: Best gelling agent for gel foaming cleanser
  • Fekher

    Professional Chemist / Formulator
    May 5, 2025 at 7:44 am in reply to: Sharing any knowledge about emulsion

    Thanks a lot for your valuables answers.

    For emulsion of Neowax165 no i did not use gelling agent . for sensicare c1060 phenoxyethanol effect the viscosity almost but with differents intensity depend on formulation . For shampoo formulation i find piroctone olamine effect also the viscosity of product the point of glyceryl laurate i really i did not get it …

    I haven’t time till now to make other samples with neowax 165 just the same formulation using sabowax AE gives higher viscosity.

    About the used level of emulsifier you have right however it is not just to stabilise oil but to reach a desired viscosity and texture .

    • This reply was modified 2 months, 3 weeks ago by  Fekher.
    • This reply was modified 2 months, 3 weeks ago by  Fekher.
  • Fekher

    Professional Chemist / Formulator
    April 15, 2025 at 3:53 pm in reply to: Centrifuge test failed for cream emulsion

    Supposed to be stable same question which emulsfier is used?

  • Fekher

    Professional Chemist / Formulator
    July 19, 2025 at 11:10 am in reply to: Comment my filters combinaison

    Thanks for sharing I want from experts their prediction about SPF because I trust their expertise (I already make it in spf simulator but I want confirmation from experts)

  • Fekher

    Professional Chemist / Formulator
    July 10, 2025 at 11:51 am in reply to: Guidance in w/o emulsion

    Thanks a lot, i’am always searching just to find better, faster reference.

  • Fekher

    Professional Chemist / Formulator
    July 9, 2025 at 4:39 pm in reply to: Guidance in w/o emulsion

    I meant lipo polymer because hydro ones don’t help a lot in w/o.

  • Fekher

    Professional Chemist / Formulator
    July 9, 2025 at 4:35 pm in reply to: Guidance in w/o emulsion

    Thanks alot @Aniela very informative just can you explain more cascading emollients or any references you recommend 😊

  • Fekher

    Professional Chemist / Formulator
    July 7, 2025 at 3:21 am in reply to: Sharing any knowledge about emulsion

    1)about glyceryl Laurate I understood your point.

    2)Sabowax AE and noewax 165 have not same ingredients so haven’t same I CI

    3)“About the used level of emulsifier you have right however it is not just to stabilise oil but to reach a desired viscosity and texture .” it is answer about that (again, in your example, as seems too much emulsifier for 10% oil)

    Did I answer for all?

  • Fekher

    Professional Chemist / Formulator
    July 1, 2025 at 9:15 am in reply to: How long do you mix your emulsions?
  • Fekher

    Professional Chemist / Formulator
    July 1, 2025 at 3:47 am in reply to: Sunscreen SPF 50

    i guess you should work on the level of use before then changing your emulsifiers .As i know yours can be fine . Make some researchement for free sunscreen formulations and you will find many emulsifiers systems .

  • Fekher

    Professional Chemist / Formulator
    June 30, 2025 at 4:55 am in reply to: How long do you mix your emulsions?

    i don’t think that GMS SE alone can give a stable emulsion .

  • Fekher

    Professional Chemist / Formulator
    June 27, 2025 at 4:12 am in reply to: Sharing any knowledge about emulsion

    Awsome answers . i agree with all said details , just i disagree with :” High concentrations of cetearyl alcohol, for example 5%, in combination with standard emulsifiers such as glyceryl stearate and PEG-100 stearate, often result in products that are waxy, slippery, or slightly soapy to the touch.” May it can lead to what you said depends on the full formulation however in all my formulations it isn’t.

    • This reply was modified 4 weeks, 1 day ago by  Fekher.
  • Fekher

    Professional Chemist / Formulator
    May 22, 2025 at 10:34 am in reply to: Best gelling agent for gel foaming cleanser

    @chemicalmatt any other alternatives from sigma i could’nt find what you cited however i find a supplier that has some of sigma’s ingredients .

  • Fekher

    Professional Chemist / Formulator
    May 19, 2025 at 4:12 pm in reply to: Best gelling agent for gel foaming cleanser

    Thanks a lot, actually there are a lot of acrylates copolymer do you recommend specific one “my dobt in carbopol Edt 2020”

  • Fekher

    Professional Chemist / Formulator
    May 19, 2025 at 4:07 pm in reply to: Best gelling agent for gel foaming cleanser

    No all cellulose are bad in pumping. The problem is not gelling I did with many gelling agent however almost are bad in pumping for brush foaming bottle pump.

  • Fekher

    Professional Chemist / Formulator
    March 26, 2025 at 2:30 am in reply to: Sharing any knowledge about emulsion

    thanks

  • Fekher

    Professional Chemist / Formulator
    March 25, 2025 at 3:55 am in reply to: Is it effective to add perfume’s fixative for such level?

    thanks

  • Fekher

    Professional Chemist / Formulator
    March 23, 2025 at 7:22 am in reply to: Which formula would have stronger cleaning power?

    There is no evidence relation that the more foam the more detergent power.

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