OldPerry
Forum Replies Created
-
Thanks for the update!
-
@Microformulation - I’d also be skeptical anyone would notice an improvement using them over a good moisturizing lotion that doesn’t have them.
-
Evonik sells ceramides and gives a suggested use level of 0.05% - 0.5%
-
It depends on the formula whether you can switch out these preservatives. But you just have to try it and then conduct a preservative efficacy test to see if it works.
-
Welcome to all the new members! Feel free to click on the “New Discussion” button on the right hand column to start a new discussion.
-
I remember writing about this once.
https://chemistscorner.com/if-oils-expire-soon-will-my-cream-also-expire/
The answer is it depends on whether the material still meets your specifications.
-
Yes, you’ll get more useful answers if you post your whole formula.
-
@przemekp - Yes, NaCl is a suitable salt for most systems.
-
Here is a more formal way to design a stability testing protocol.
https://chemistscorner.com/how-to-stability-test-a-cosmetic-formula/ -
@Doreen - I’ve also found that you get less air trapped in the formula by neutralizing at the end.
-
Hello - I would suggest you get in touch with some of the people in this organization.
-
I’m afraid you are getting too far ahead of yourself. It would help if you knew more about the chemistry you are working with before going further. You shouldn’t be mixing acids and bases together if you don’t know some basic chemistry. It can be dangerous.
Xanthan gum is not an emulsifier. At most it is a suspending agent which helps support emulsions. There is a lot of misinformation on the Internet so I would encourage you to start from the beginning.
I would suggest you start here.
http://makingskincare.com/how-to-make-a-lotioncream-part-1-equipment-and-ingredients/ -
You need something alkaline to neutralize the Stearic Acid so Isopropyl Alcohol or Glycerin will not work. What’s wrong with sodium hydroxide?
-
Use a solubilizer for the oils (like polysorbate 20 or 80) Premix the oils with the solubilizer before adding to the batch.
You can do a salt curve analysis to see how salt levels and pH affect rheology.
https://chemistscorner.com/salt-curve-analysis-how-to-control-cleansing-cosmetics/ -
Depends on many factors but most batches I’ve made in the lab use between 300 -900 RPM
-
Hand blenders can be fine for lab samples. They just aren’t used much in professional labs because you can’t easily reproduce the effect in a large production tank.
Yes, you should stir the whole time on cool down. Just not at the same high RPM.
Hand mixers draw in too much air which creates the bubbles. When blending you need to keep the propeller submerged and avoid drawing in air.
-
@ozgirl - yes, that reflects my opinion about the technology too. A marketing gimmick that makes people feel special.
-
@Zink - do you think someone could analyze a customer’s skin with the tools we have available now and create a customized formula that would work best specifically for their skin?
I’m talking about working better than standard products that are designed for dry skin, oily skin, etc.
In your example, a person over 30 and doesn’t want wrinkles. That isn’t really customized to the person. It is customized to the group of people like them.
I’m talking specifically about customizing a product to a specific person based on some analysis of their skin. I guess in your final paragraph you agree with me that the technology isn’t quite available now.
-
Contact some of the formulators here.
https://chemistscorner.com/cosmeticsciencetalk/discussion/137/need-formulating-services-here-are-some-contacts -
@DAS - Since it’s L’Oreal I would guess that their lawyers have said it was legal. Although it may be in some grey area and they are pushing the boundaries.
Let’s say it is perfectly legal. Do you think this could actually work? That is, do you think someone could analyze a customer’s skin and create a customized formula that would work best for their skin?
I just don’t see any evidence that cosmetic formulations or skin analyses are that sophisticated.
-
These are all excellent points about the business model.
But what do you think of the general premise that it would now be possible to create a customized product based on the analysis of someone’s skin to provide superior results?
I find the whole premise is flawed.
-
@arachne013 - You could create a formula with only the following ingredients that would perform the same as the one you listed.
WATER, DIPROPYLENE GLYCOL, 1,2-HEXANEDIOL, CITRIC ACID, SODIUM CITRATE, ALCOHOL, PENTYLENE GLYCOL, BUTYLENE GLYCOL, FRAGRANCE, YELLOW 6 (CI 15985), RED 27 (CI 45410), PHENOXYETHANOL, ETHYLHEXYLGLYCERIN
I believe in both product ingredient lists that you’ve posted Allantoin is simply a claims ingredient.
-
Perhaps you could share the entire ingredient list.
There are better things for preventing chapping.
-
What benefits are you getting by having Allantoin in your formula? It’s possible you don’t even need it.
-
Probably because Potassium Sorbate and Sodium Benzoate are not naturally produced.