OldPerry
Forum Replies Created
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It’s just one of those things you’ll have to try it and see.
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Your welcome!
Thank you for your questions and comments.
Perry, 44
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What @Bobzchemist said.
I’m of the opinion that since there is no real downside to including a preservative (except preventing your company from using fear marketing) they should be included in most any formula.
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It would also be a good idea to look at products that are already on the market for this consumer group. Motions, TCB, African Pride are all good examples.
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Who pays $44 for a 500mL shampoo?
People you want as customers!
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You’d have to contact the individual programs. I think University of Cincinnati is ~$35,000, but I’m not certain.
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P&G slipped this year due to selling off brands right?
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Interesting!
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Here’s my review of it. https://chemistscorner.com/harrys-cosmeticology-book-review-edition-9/
In truth, I think you might get more out of Edition 8 if you can only buy one.
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It’s difficult to say because “colorless liquid foundation” and “pre-made lipstick base” are not descriptive enough to indicate what chemicals they are composed of.
If you want it to be thicker, you could probably add a wax like carnauba wax. To make the mate less shiny you could get rid of the jojoba glaze.
But these are incomplete suggestion because I don’t know what is exactly in your formula.
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I’m not aware of any research showing a connection between bubble size and surfactant micelle size. Bubble are a result of processing mostly so that would have a vastly greater effect than micelles.
I also have not heard of molecular weight being connected to bubble size but it’s an interesting question.
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I don’t think nearly enough consumers are familiar with the EWG or their database to justify spending the money to get registered.
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Great! Thanks for the link.
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Very interesting! I was asked about this for an article in Chemical and Engineering news. I didn’t have a chance to read it yet but the abstract was fascinating.
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There will be lots of suppliers showing their wares at the upcoming Suppliers Day in New York / New Jersey. It might be good to go visit.
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Looks like that is produced by Kraton Polymers.
http://www.kraton.com/ -
Typically, you set specifications that can help determine if your product meets your quality standards.
To ensure the product concentration you just need to make sure the right amount of the ingredients are put in the batch. Have a batch sheet that is filled out by a compounder listing exactly how much of the substance was added.
For homogeneity, you can use color checks, physical evaluation, microscopic evaluation. This is the job for a quality control group. You don’t really have to have each batch chemically analyzed.
Most companies set their own specifications and have an in-house QC group do the testing.
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Thanks for the update.
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@David08848 - “Am I understanding this correctly?”
I think you’ve got it now. Before you make a batch you can make all adjustments by changing the amount of water (or main solvent).
After you’ve made a batch and you want to increase the level of an ingredient, you have to recalculate all the ingredients. In fact, I don’t think it’s possible for you to add an ingredient to a finished formula without affecting the levels of all the other ingredients in the batch.
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Now if I wanted to change one of my formulas to increase the amount of one ingredient which is currently at 10% by say another 10%. (Doubling it) Wouldn’t I take the current formula minus the ingredient and recalculate it down using 80% as my total so all the current ingredients keep their proper percentages and relationship to one another and now equal 80% of the formula and the other 20% is the ingredient that I doubled is then added to the 80% to equal 100%?
In this case, you would simply reduce the water (or solvent) amount by 10%. You don’t recalculate all the other ingredients. Just the solvent.
For example, if you have a formula that is…
Water = 80
Citric acid = 10
EDTA = 10and you wanted to double the amount of citric acid. The formula would then become…
Water = 70
Citric acid = 20
EDTA = 10 -
“Don’t you have to recalculate to get your actual new formula that is 100%?
If so wouldn’t it be:
water=98.02
citric acid = .99009
EDTA = .99009now totally 100%???”
YES, that is correct.
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I’m not sure I understand your question but I’ll take a stab at an answer.
First, every formula always adds up to 100%.
It is convenient to assume that one of your ingredients is the main solvent, and then whenever you add a new ingredient you just subtract that amount from the main solvent (usually water).
So if you start with water and add 1% citric acid, you know have 99% water and 1% citric acid. For each subsequent ingredient added you can reduce your main solvent level accordingly.
When you need to recalculate.
Recalculating is only required when you make a batch of something and then add an ingredient afterwards. So, suppose you have a formula with 99% water and 1% citric acid. But say you want to add some functionality like 1% tetrasodium EDTA. Well, you can’t just add that ingredient to the finished product because now your total formula volume is greater than 100%.99% water
1% citric acid
1% EDTAIn this case, all the ingredients would have to be recalculated to get their actual percentages. The total amount is 99+1+1 = 101. So the actual percentages are
water = 99/101
citric acid = 1/101
EDTA = 1/101I’m not sure if that answers your question but hopefully it does.
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Here is a spreadsheet and a video with instructions on how to use it.
https://chemistscorner.com/cosmetic-formula-spreadsheet-template/
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For solving the problems (dry, cracked skin) nothing works better than Petrolatum. But it is not the best for aesthetic reasons.
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@PharmaSpain - Most companies suffer from the NIH (not invented here) syndrome so there are very few who would take an outside idea and execute it well.