Forum Replies Created

  • asafvarlix

    Member
    January 20, 2020 at 8:57 pm in reply to: Phenoxyehtanol severely changed shampoo viscosity

    Dear jenny,
    1. you’re not mentioning HOW MUCH phenoxyethanol you are using.
    i know it’s common to use between 0.5%-1.1%.  are you using more?

    2.how much SLES you are using?  my experince shows that if you use too little, the formulation is very weak and sensitive to problems such as you mentioned.

  • asafvarlix

    Member
    January 20, 2020 at 8:53 pm in reply to: Problem with creating a Peeling gel with carbomer

    Hey Dr., thanks a lot. the carbomer which im using lowers the pH to right at the begining. to 2.4, i assume you meant i’ll neutralize it (it’s no hassle…) beforehand….? i can try….not sure if i’ll remain with a clear gel though…

    2. i add the carbomer slowly & gradually to the beaker while fast over-stirring it, and then subsequently i homoginze it and continue to stirr it untill it’ll swell and wet (takes about 40 minuts at RT) - so yes, i let the carbomer swell firt.

    3. May i ask - what is the advantage of such a concectrated NaOH solution that you proposed? I thought the idea is to increase its overal solution volume  - so it’ll get everywhere in the mixer faster- thus entrapping less bubbles.

    I’ll do try tomorrow the pre-neutralizing method that you mentioned.
    and yes, electrolites and carbomer were never friends…that’s why i was surprised when i needed to create this product..i’ll try raising the carbomer

  • asafvarlix

    Member
    December 5, 2019 at 7:33 am in reply to: About cream hardening….

    Dear Perry & Bill, Bill got that precisely right -
    Its happening with Cetyl alcohol, stearyl alcohols and stearic acid.

    What’s the “name” of this phenomenon - should one exist?

  • asafvarlix

    Member
    February 3, 2019 at 6:51 pm in reply to: Plant derived Bath gel thickners

    Thanks!

  • asafvarlix

    Member
    January 31, 2019 at 8:48 pm in reply to: Is Polysorbate 20 sufficient?

    Gunther, aren’t silicones able to break the sticikness and promote less stickiness- like, anti-foamers, as an example?

  • asafvarlix

    Member
    January 31, 2019 at 8:46 pm in reply to: In case you were curious…

    Nice photos perry, well done!

  • asafvarlix

    Member
    January 30, 2019 at 4:04 pm in reply to: On stability philosophy & separations…

    I see Gunther, that is a good idea and ill check it
    However - i still want a take home message: how can it be that a lotion that sits for a year on my desk - stable and looking very good-   is being separated after 2 weeks in the oven?

    is it even a good practice to always check lotions in an oven?
    can’t a centrefuge tell another story aswell?

    what is the verdict, lets say, to a lotion that separates in 2 weeks in the oven, but is stable after centrifuge?

  • asafvarlix

    Member
    January 29, 2019 at 5:50 pm in reply to: On stability philosophy & separations…

    thanks all - so what you’re trying to tell me is that you definitly saw and worked with lotions and light creams that sat aprox. 2 months at least at an incubator - and barely changed ? 
    no inner bubbles, no top humditiy forming, the same as inserted (setting aside perfume / color slight changes)

    what abut the need for humditiy being constant at stability checks?

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