Bobzchemist
Forum Replies Created
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Also, we will private label any of our sunscreen products - just in case anyone’s interested.
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This is the one we make here at Beaumont - just in case anyone at your place is tempted to think that I’m giving advice that isn’t based on relevant experience:
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That’s a great question, @laskedbetter.
Discrepancies between INCI names on Tech Data Sheets and the information in MSDS Section 3, “Composition/information on ingredients” are the reason I insist on a signed, official statement from the manufacturer listing the INCI name(s). It’s one thing for a company sales department to put a partial INCI name on a data sheet - it’s quite another to have to certify the accuracy of the INCI listing in an official document on corporate letterhead signed by the head of their technical or regulatory department.To answer your question, my LOI would very probably look much more like the MSDS than the TDS - but either way, I’d have a credible document that I could show to the FDA proving that I listed everything on my LOI that the supplying company said was in there. -
I’m not sure Nick is full time in the consulting business anymore, but you should still check with him. http://www.linkedin.com/in/nickmorante
You could also try Rich Konik. http://www.linkedin.com/pub/richard-konik/36/931/a8 -
Private label will be better to get your feet wet with
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Hmmm…how do I put this nicely?
The short version is that the vast majority of this information is not available for free. You either have to put in the many, many research hours you’ll need calling and talking to raw material and equipment manufacturers for information, and/or buy and read a few books and magazine articles, and/or take a class on the subject, and/or hire a consultant.I would suggest researching the colored mica manufacturers first, getting trial formulas from them, and then looking at the manufacturing instructions to give you an idea of what you’ll need. There are even some DIY websites that you can look at.I will give you a preview of what you’ll eventually find out, however. Usually, it is not cheaper to make your own color cosmetics (as opposed to buying them from a contract manufacturer/private labeller) unless/until you are making a very large quantity of them. The major reason for this is due to how capital-intensive it is to invest in the (very expensive) production machinery.I’m sort-of in the middle of trying to prepare to teach a seminar on this subject, but it’s not going at all well, and I won’t be finished any time soon, if ever. But I will be happy to answer specific, limited questions privately. One at a time. -
@erindlea, you’d be surprised at how discerning a regular customer can be. Sometimes, something you’ll think is a minor change will stick out like a sore thumb…
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I’d be interested in one too. I don’t think I’ve ever seen any outside of proprietary, company-specific SOP’s.
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I’ll check to confirm who we are using, but I’m pretty sure it’s Atlanta Label.
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Can you somehow intensify the color difference between read and unread posts?
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It’s worth a try…
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I think Dry-Flow would be a solid, economical choice. Unless you are making a high-end product, you probably won’t be able to afford the more sophisticated microspheres.
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http://fscimage.fishersci.com/cmsassets/downloads/segment/Scientific/pdf/foodtrack_summer_07.pdf
When we tried to pH test our sunscreen spray here, it was always diluted in water, but it didn’t help enough. There can be no pH reading without water, so you really should just tell management that the readings you got were meaningless. -
Doris,
Do you know how pressed eyeshadow is made commercially? -
We used to use something like this to mix closed containers, so that the mixing couldn’t evaporate any solvent. But the best thing to do is still exactly what your supplier does.
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You need to talk to your supplier. The ideal situation is that you and the supplier both have the identical (or at least very similar) test equipment, so that they test a shipment, send it to you, you test the shipment, and BOTH of you get similar numbers - if shipping a product causes it to fall apart, you have serious problems.
As for justifying the price of a viscometer, right now, you are at the mercy of your supplier - you have no way of telling whether or not they sent you good product.(Also, not that expensive http://gardco.com/pages/viscosity/vi/dve_viscometer.cfm)It sounds to me like you need your supplier to increase the amount of suspending agent. -
Speed is how fast the motor will turn, torque is how much force/strength it turns with. Without enough torque, speed will not do anything much.
For example, in the US, we have some hand-held battery-powered fans for the summertime that turn at very high speeds - but if you were to try to get them to move anything thicker than air, they would come to a screeching halt. The same principles apply to lab mixers. -
We here at Beaumont operate under a different scheme. Since we are a FDA-registered manufacturer of OTC drugs and of cosmetics, we come under more frequent scrutiny by the FDA.
So, every ingredient we use has a dossier. One of the critical pieces of information in that file is a signed, official statement from the manfacturer listing the INCI name. We are allowed to rely on our suppliers - we don’t have to do any of the work ourselves, so the INCI name has to be whatever the supplier says it is. If we got a listing from a manufacturer like @milliachemist posted, we would have to list each ingredient separately, and in % order.The ingredient manufacturer is legally obligated to give you enough information for you to prepare an accurate LOI (but only after you have actually purchased the ingredient), although they are allowed to make you sign a NDA before they release it. -
Why do you need tin oxide? It’s banned in Japan, and has no effective use in cosmetics that I know of, unless you are making colored mica as a raw material.
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On a production level, I would make new batches and blend-off about 10-20% of the bad batch each time. If you are selling this, your consistent customers will notice the difference if you fix the batch any other way.
The only way around this, in my opinion, is to make it a new product. It’s water-thin, so it could be a sprayable emulsion. Or, you can add a sensorial thickener to give the product an unique feel, and sell it in a different package. -
CCT is a liquid at almost all temperatures. Look up solidification/melting points to find this information easily for almost any material.
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I’ve worked with nail polish and nail polish formulation, so I can help a bit.
First off, all nail polish is colored with insoluble pigment, for a variety of reasons (not the least of which is that customers get upset if their nails are dyed even after they remove the nail polish).What this means for you and the company you are working with is that all of your products are dispersions/suspensions - and the reason you are getting “separation” is that gravity works. The good news is that there are established rules that govern the behavior of dispersions.The rate of settling that you’re going to get will change based on only two or maybe three variables. I’m not going to get into the rheology much, but the most important variable is the suspending power of your nail polish base. The suspending power is somewhat related to the viscosity of the base, but is much more specifically related to the yield value (which, unfortunately, is much harder to measure than viscosity) Because nail polish is deliberately formulated to be thixotropic (look it up) you will have to roll or stir it for a very specific time every time you want to measure viscosity. Consult your supplier for specs and methods.The other major variable(s) will be the pigment particle size, weight, and shape. Because you’re counting on the suspending power of your base to fight against gravity, the smaller/lighter particles with as much surface area as possible will stay suspended longer.The minor variable is being able to prevent the pigments from agglomerating/re-agglomerating. -
None of them. There are very, very few plant materials that do anything at all.