Forum Replies Created

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  • evchem2

    Member
    December 28, 2022 at 4:17 pm in reply to: Strange phenomenon, any explanation?!

    Since you’re saying it’s not related to optics/path length, there’s three possible culprits made from the points here:
    1. different mix energy (this sounds most obvious, you can try to calculate energy being applied in the small scale and match it in large but not sure how feasible that is for you)
    2. raw material variation (not clear if you used the same lot of keratin/ other materials in all your batches so maybe this isn’t an issue. On a related note we once had an issue with a contaminated barrel from a supplier and when we pulled from the bottom with a pump vs syringed off the top made a difference- took way too long to realize there was some residual mystery material in the bottom of the barrel)
    3. formula incompatibilities/ chemistry - we don’t know what exactly is in your serum so not sure how much we can help on that front. How is your keratin supplied (solution vs powder? is it functionalized?)

  • evchem2

    Member
    December 27, 2022 at 2:26 pm in reply to: Milky White Handwash making

    Titanium Dioxide itself won’t need heat, but you’ll still need to add something to suspend it- synthetic or natural polymers could work. There are other synthetic opacifiers as well, but they may not be favorable for cost/ environmental reasons

  • evchem2

    Member
    December 2, 2022 at 7:42 pm in reply to: Ferulic acid turns yellow in anhydrous LAA serum

    Are you in the US? I see people working on these types of serums constantly, if they were taken to market are they not in violation of L’Oreals current patent? 
    https://patents.google.com/patent/US20050154054A1/en

  • evchem2

    Member
    November 10, 2022 at 2:44 pm in reply to: Does NACL do any benefit in liquid laundry detergent?

    Level of surfactants is low, is this for hand washing clothes? You’ll need more surfactant if you want to salt thicken.

    What grade (molecular weight) CMC are you using, and is it for antiredepostion?  you could use a higher molecular weight to thicken your fomrulation, but I don’t know what impact (if any) that would have on washing performance

  • evchem2

    Member
    November 3, 2022 at 8:49 pm in reply to: Shampoo for coloured hair

    amodimethicone is supposed to be better for damaged (color-treated) hair, as it can bind to the damaged sites more effectively than uncharged silicones

  • evchem2

    Member
    November 3, 2022 at 8:42 pm in reply to: Why some water float above product?

    You have a very small oil phase, so w/o which is already a difficult system to stabilize is even more unlikely to form because of the high amount of internal (dispersed) phase vs the extremely low continuous phase, on top of the other issues already mentioned. 

  • evchem2

    Member
    November 2, 2022 at 12:35 pm in reply to: Dipropylene Glycol as an odour masking agent

    You can try deoplex from carrubba for odor masking

  • evchem2

    Member
    November 2, 2022 at 12:31 pm in reply to: Colored Chapstick that does not tint the lip

    Color cosmetics isn’t my wheelhouse but my thinking is: go the dye route for no tint (lakes if your formula is anhydrous, though I’d be concerned these might have some payoff) - if you are US based check the allowed dyes/lakes for contact with mouth Part 74, Subpart C: 

    Alternatively look at burts bees or similar commercial product you want to mimic and check what ingredients they are using.

  • evchem2

    Member
    October 24, 2022 at 1:18 pm in reply to: Why adding buffer to semi-permanent hair dyes?

    Haven’t worked on these kinds of products, but my guess is maintaining certain pH range could be important for the dyes used and their stability.

  • comments above make sense to me. On an unrelated note, how do you incorporate both xanthan and cationic guar? Are you worried about any long term instability since you have both anionic and cationic polymer in your formulation?

  • evchem2

    Member
    October 17, 2022 at 2:57 pm in reply to: Mist Stability Help

    Better actuators- packaging can influence the spray pattern. Glycerin shouldn’t be separating from a water based serum, you have something else going on

  • evchem2

    Member
    October 7, 2022 at 2:06 pm in reply to: Aloe Vera Gel Carbomer Choice. Help

     Carbomer is not a great choice for this kind of system because it will function best (in terms of clarity and viscosity building) at pH closer to neutral.  Even the ultrez grade is still not very electrolyte tolerant and you have plenty of salt sources. Check out the lubrizol website or UL prospector if you have access. 

    Additionally, your preservation system will see huge drop off inefficacy as pH increases. Those salts should really be used for systems where pH is <5. 

    Your system doesn’t add up to 100% by quite a bit, is there a typo or are you excluding ingredients? Either way if your water phase is really only ~60%, you cannot make a “100%” aloe gel, the aloe can only reconstitute in the available water. There’s also some debate about the labelling (at least in US) if you can really list your INCI as Aloe juice when what you intentionally added is Aloe powder.

    So you may want to either choose a new preservative system that works at neutral pH so you can keep carbomer- you’ll still likely need excess because of the aloe, or a different rheology modifier (xanthan gum for example, the grade you get will impact the final appearance greatly but it can handle lower pH and salt)

  • evchem2

    Member
    October 6, 2022 at 7:55 pm in reply to: Aloe Vera Gel Carbomer Choice. Help

    What pH is your formulation at?

  • evchem2

    Member
    October 5, 2022 at 2:57 pm in reply to: What is cause? Hec is swells

    At 5.5 sodium benzoate is mostly in the salt form which is ineffective as a preservative. Agree with other comments on that you need to switch to a different preservation strategy. 

  • evchem2

    Member
    October 5, 2022 at 2:55 pm in reply to: gelling agents for glycerin??

    Bar Gel G from Barnet Products (INCI: Polyglyceryl-10 tristearate) works to some extent, but I’m not sure if they still carry that product.

    Kelco-Care from CP Kelco/Lubrizol (INCI: Sphingomonas ferment extract) will also work, though without heat it may take a day or two to see full hydration.

  • evchem2

    Member
    September 27, 2022 at 1:17 pm in reply to: Food grade modified starch used in cosmetic

    I would say the only possible concern is maybe micro count, sometimes the food spec is higher since the products  generally have shorter shelf life

  • evchem2

    Member
    September 15, 2022 at 7:21 pm in reply to: need help with mineral sunscreen / pilling off when applying on skin

    I don’t know what specific grades of xg and HEC you’re using but they could be contributing to pilling (esp in combination with the starch and silica), can I ask why you’re using all 4?  

  • evchem2

    Member
    September 2, 2022 at 1:35 pm in reply to: Help with defining gel (for curly hair)

    I agree with what’s already been said- I  also think you could drop the coconut oil to  just claims level (0.01%), it’s not functional for your formula and will just make it harder to have clarity, require higher usage level of PEG-40… based on that benchmark I’d say your 1% line is right after the VP/VA

  • We had a storage tank inline from our filtration/purification system- I’m not sure how storing in the production tank would work. You would probably want to validate you are able to totally disinfect the tank, maybe let some water sit in the tank for your worst-case timeline and test? I can see it being very demanding if you go that route so the second tank may end up being less costly in terms of time/ liability.

  • evchem2

    Member
    August 23, 2022 at 12:58 pm in reply to: what preservative can i use for my conditionner

    I’d opt for liquid germall for preservation, but use level might be closer to 0.5%. Which form of vitamin E are you using? If it’s tocopheryl acetate it’s pointless and you should switch to tocopherol or eliminate entirely

  • evchem2

    Member
    August 22, 2022 at 1:00 pm in reply to: Hi friends EGDS is not available more

    EGMS is also used for pearlizing, you may be able to get opacity from the fatty alcohols you have currently but not pearl.

  • i couldn’t find anything comparing different acids but some suppliers have charts like you’re describing for their individual preservatives

  • evchem2

    Member
    August 16, 2022 at 4:46 pm in reply to: Difference between HDPE vs polyethylene plastic

    HDPE is high density polyethylene, it is polyethylene but has different properties than lower density

    https://sciencing.com/differences-hdpe-plastic-polyethylene-plastic-6807965.html
    https://omicoplastics.com/blog/ldpe-hdpe-similarities-and-differences/

  • evchem2

    Member
    August 16, 2022 at 4:43 pm in reply to: Emulsification Question

    Is it very thick? Sea moss could be improperly labeled carrageenan which would not act as an emulsifier but maybe it could stabilize the system enough if the oil content is low. But agree with the others, they could just have left out the emulsifier altogether from the LOI

  • evchem2

    Member
    August 10, 2022 at 9:04 pm in reply to: Distilled water contamination

    @Anca_Formulator i see thanks for clarifying. I’ve never used the paddle culture, but isn’t it the same issue? The paddle’s been exposed to air for the past 3 months?  Even if the kit is not expired once you’ve exposed it I think the most reliable results are probably the ones after the ~120 hours/whatever the paddle supplier recommends.

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