MarkBroussard
Forum Replies Created
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If you want to make your life easier, check out the predispersed ZnO and TiO2 products from AppleChem.
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Have you considered Retinol Liposomes … you can purchase at FormulatorSampleShop in as little as 2oz. Or, contact Ross Organics, they can provide you samples of BASF Retinol … it comes in various formats.
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It all depends on the tatoos … If they are tasteful body art, not really a problem. Now, if you got “prison bitch” tats … well, that’s not going to help you in the professional workplace.
LOL! @Belassi … true that!
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Every lab is different and has different equipment. They will train you on their specific equipment and methods. If you know their niche/focus … start reading up on those techniques.
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I have 3 degrees, including 2 masters degrees. I can tell you that college is great benefit, but nothing trumps experience. So, don’t be threatened. If you are competent, you’ll learn much more from your professional colleagues and work experience than you would ever learn in university.
University really just teaches the basics, not any meaningful applied science. I remember my first job. After the first week, I realized I have been in college for 6 years (BS & MS) and I really did not know anything!
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The Schuelke incubator is really designed for Microbial Strip incubation and has a max temp of 30C, so it really would not be appropriate for stability testing. The Lotioncrafter incubator is what you need.
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Schuelke & Mayr have a couple of products … Sensiva PA 30 and Sensiva PA 40 that use Phenylpropanol instead of Phenethyl Alcohol to cut down on the rose scent if you find it objectionable.
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It is critical that you get an even dispersion of the ZnO for your sunscreen to be effective. So, best your predisperse in a carrier oil before forming your emulsion.
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Phenethyl Alcohol is the preservative.
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Take a look at AppleChem predispersed ZnO products.
The other way to “fill in” the hole is to pour, allow to harden (but not completely) and then pour a “top layer” to fill in the hole and cover the surface (that’s if you are top filling). As BobZ pointed out, the easiest method is to use Bottom Fill stick containers.
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Thanks! Very much appreciate the comment. That is about the only technique that I can think of for solids.
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What you are describing … muddy, gritty .. similar to henna … is not Konjac Root Powder.Konjac Root Powder is a pale beige color, similar to Xanthan Gum, and forms a clear gel when used at 1%. At percentages less than 0.5% if thickens, but does not gel.
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It behaves like a gum … your best bet is to homogenize it.
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Are you pre-dissolving the plant extracts in water prior to forming the emulsion or are you adding them in powder form post-emulsification?
Trry adding the plant extract powders to your aqueous phase prior to forming the emulsion.The SAP is heat sensitive, so it should be added post-emulsification at 30C or so.Nix the citric acid … your final pH in this formula should be 6.0 to 7.0 for max stability of the Niacinamide and SAP. -
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Zemea 1,3-Propanediol (from Tate, Lyle & Dupont) is a plant-derived, renewable resource alternative to Propylene Glycol and complies with ECOcert and other natural standards. You can’t go wrong using it.
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Why don’t you use Monolaurin instead of Lauric Acid … it has very good antibacterial activity and is a multifunctional … an emollient, an emulsifier and an antibacterial. You can purchase it from Sabinsa. You might also consider throwing in a bit of ethylhexylglycerin.
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No, these products are essentially unpreserved. “Fractionally Distilled” is simply the method by which the aloe fraction was extracted from the bulk mother liquor. You’re right about glycerin.
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Your best course of action would be to coordinate with the other clients who have similar issues with said “chemist” and each of you contact the District Attorney’s Office and Sheriff’s Office in the county/state in which the “chemist” resides and each of you file complaints making sure you reference one another’s complaint. If the DA see’s a pattern of behaviour, he will most likely look into it.
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As a follow-up, I tried making deodorant sticks using Carageenan/Hydroxyethycellulose and Carageenan/Xanthan Gum per the following patent:
Quite honestly, I find Sodium Stearate easier to work with and the end product was superior. The Carageenan sticks had a nice light feel with no residue and absorbed quite quickly, but I did not much like the sensorial.Now, I did also use Carageenan/Hydroxyethylcellulose and 3.5% Sodium Stearate which gave an interesting product sensorial, but … not quite sure about it. -
Certainly, that model could work. But, like any business, it all depends on the personalities involved and their commitment to the “group” projects versus whatever projects they are working on as individuals … could work wonderfully or it could be like herding cats.
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@AmyBurton:
I think you are perhaps missing the main point:Does the chemist you choose have the skills and experience to deliver on the formula you developed or are paying the chemist to develop and can he deliver that to you in a reasonable time frame?Everything else is incidental to that objective.And, the only thing that will prove that to you is a track record with clients (which you may be able to reference) and/or products that the chemist has brought to market on his own account.As a contract chemist, once you have turned over the work product to the client, unless you are conducting stability testing for them, there is no need for you to maintain samples. -
@Amy Burton:
(1) It is perfectly reasonable to request references that you can speak with regarding their experience with the chemist. Now, it may well be that the client(s) and chemist(s) have entered into a confidentiality agreement. Not all clients want it to be known that they work with a consulting chemist, nor which consulting chemist(s) they work with. So, that may be an issue that limits the references any particular chemist may provide.(2) Sample of the chemists work? That would fall into (1) above. If the product has been commercialized and is on the store shelf, probably best that you just purchase a product the chemist has developed. We don’t have samples just laying around for you to touch and feel … I don’t know what that would tell you exactly.(3) A tour of their lab/facilities … same thing … if you are willing to spend the money for a field trip, generally not a problem. But, some manufacturing facilities may have restrictions, again due to client and/or process confidentiality.(4) Credit Card payment … probably not an issue for some consulting chemists. But, not all are going to have CC processing. It’s not that type of business where CC are often used. -
There are a couple of ways to give testimonials/feedback … Post on the consultant’s Linkedin Page, Google+, Facebook, etc. regarding your positive or negative experiences. You could also easily create a post on this forum giving feedback on your experience.What this all boils down to is doing your proper due diligence in selecting a consultant by reference checking with their clients. Any reputable consultant will give you a reference list if you ask.It also boils down to contract negotiation. It is standard in any industry that you perhaps make a 50% up front payment for the consultant to begin work and then a final payment once the work product has been delivered or at agreed upon milestones. I never would have made a final payment without having some work product from the consultant in hand.
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@inspire78 and @Lily88:
Have you communicated with one another to confirm that it is the same Chemist you are dealing with?