Doreen
Forum Replies Created
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@Sibech
Regarding ascorbic acid. I have experienced orange discoloration due to Maillard reaction, ascorbic acid as reducing sugar -> amino acids in skin. I had orange staining of hands and bed sheets and the smell was typical of that of a cheap self tanner. It was a very concentrated (≥20%) L-AA serum. (The serum itself had no smell and no colour btw)Now what still isn’t clear to me, and I hope you or anyone else can answer: does the Maillard reaction with L-AA trigger oxidation reactions?
Maybe it’s just psychological, but the discoloration + awful smell didn’t feel like it was stimulating collagen synthesis at all. :joy:
(p.s. I gave up topical L-AA a long time ago)
@vanne
Ok, maybe it’s best to list all the ingredients + percentage.
But… neem oil? Yikes! -
@DiamondD @ChemicalPyros
This is awkward, I haven’t seen your replies until now?! I’m sorry for not responding earlier! 😮@DiamondD
1. Exactly, that is how I see ‘in-can’ protection too.
2. I have the exact same problem!! I used to put it in the cool down, but then I saw several formulations that put it in the heated oil phase.
Somewhere I have read about stability of vitamins, I’ll search for it again, regarding heat, vitamin E stood under ‘unstable’. If it’s true I don’t know and I also don’t know for which forms this counts.@ChemicalPyros
Thanks for the information on γ-tocopherol and your answer on BHT and vitamin E. I had read that too somewhere, that these can degrade eachother (yellow discoloration?), but I have seen several formulations where both were added.
Thanks, both of you! If I find documents etc about it, I’ll come back with these. If you have any documents/links etc. feel free to share! -
Ok, good luck!
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It’s also concentration/dose-dependent. People can help you better if you write down the % too. I use phenoxyethanol and allantoin all the time, but I have never experienced itchiness.
I would rather omit the L-AA, it’s very unstable and a potential irritant.
And ethereal (‘essential’) oils can be just as irritable as synthetic perfume oils, sometimes even more so.
Also, your emulsion is very weak on fungi and yeast, with only phenoxy present.pH 4.5 is on the low side, probably because of the L-AA.
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No it’s not. Maybe you should study the ingredients you want to work with before you even think about using them.
https://pubchem.ncbi.nlm.nih.gov/compound/2-phenoxyethanol#section=TopPhenoxyethanol isn’t strong on mold btw.
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What were you planning to use it for?
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@”Dr Catherine Pratt”
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You’re welcome! :+1:
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@em88
You’re welcome! :+1: -
It’s just a list, so no recommendations, as I don’t have experience with any of these. I mostly buy from German suppliers.
But I don’t know where you’re located?USA
http://www.tkbtrading.com (make up)UK -
True! It’s been a while since I’ve used a cheap brand and I don’t make pressed powders myself, but I remember it as very frustrating. And also powders that fall apart completely, even when the tin is still rather full.
The make up that I use may be pretty expensive, but I would never try to make it myself. Way, way too complicated to get it just as perfect.Good luck with your eyeshadow project!
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@Perry
I think @APRYL_H means that the eye shadow falls from the skin after it’s applied. Or am I mistaken? I’ve had that in the past with a cheap brand too, like it won’t stick to the skin. -
@Bill_Toge
:joy:I just love your and @Belassi ‘s sense of humour. :joy:
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Do you mean DIY suppliers?
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@maria
Why would a mix of shea and cocoa be drying?@cindychums
Does the EU actually take the product sample to test the presence of the listed ingredients?I would like to know this too, especially for baby products.
I totally understand your suspicion. I don’t think the tea tree nor the rosemary has any positive effect on eczema. -
0.5% w/v for Botox inactivation. Which also meant the cleaning of the crossflow bench (made of stainless steel) where it was prepared in, after a short while the whole surface of the bench was damaged irreversibly.
The inactivation procedure of the whole bench was just to be sure that a minute spillage that wasn’t noticed would be inactivated as well. Very drastic (and expensive) measures.Ok, this was done in hospital mostly for non-cosmetic indications, but the effect on the steel of the workbench was dramatic, even with a concentration that low.
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Biologically Active Substances? I’ve been googling my ass off and can’t find it either. I have no idea.
The sentence right after it is: “Therefore, it is recommended to use “Aristoflex
AVC” in products for aging skin…..” so probably something to do with Aging Skin? -
@MJL
You’re welcome! :blush:
You’re totally right, many commercially products have the same problem, that’s what I experienced too.Thanks, and I hope you will find a solution as well!
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@Gunther @aperson
In the second study ^^ they name the use of friction during sanitizing.During my cleanroom courses I have learned (or learnt?) that friction (by wiping for example) is more effective than just spraying and letting evaporate. It has been a while and I can’t remember the reason/mechanism behind it.
What is your view on this? -
For people who use pure alcohol to sanitize (years ago I also used to think the higher the %, the better):
A diluted solution (e.g. 70% IPA) is more effective than pure alcohol, because the water will denature the proteins of the bacteria.
https://sciencing.com/alcohol-kill-bacteria-5462404.html
http://makingskincare.com/how-to-make-a-lotioncream-part-1-equipment-and-ingredients/ -
@MJL
The skin actives in powder form were dipotassium glycyrrhizinate, allantoin, dl-panthenol, betaine (trimethylglycine), Tambourissa Trichophylla leaf extract. I used a lot of allantoin (1.5%), betaine can help solubilize higher % of allantoin (it also works with salicylic acid).As long as I use one, thin layer of cream, there’s nothing wrong. But as soon as I use a thick layer or if I try to apply a second layer, it starts pilling a bit and gets powdery later on (not much, but still).
About your serum: I have made something similar years ago. Also a hyaluronic acid thickened serum with lots of actives. I didn’t have powdery problems then as far as I can recall (it was a bit sticky though, I suspected the PEG-40 back then).
I also used a bit of PEG-40 hydrogenated castor oil to solubilize the ethereal orange peel oil that I used in it. There was also some ferulic acid, sodium lactate and tocopherol. Later on I questioned myself why I had used NAG and HA together. (NAG is a constituent of HA) -
Very interesting, thanks for the link!
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@carvan
Thanks for the offer, but I’m afraid I don’t have time for a project like that right now. Thanks anyway and good luck!