Thank you so much for your answer! :)
Totally forgot about the effect on the glass electrode! :flushed:
Glad you brought that up!
Yes I reckoned the IPA was mostly there for solubilizing the Thymol Blue, since it isn't soluble in water. I…
Sunscreens aren't for homecrafters to make (including the ones with TiO2 and ZnO), so it's wise that you don't make it yourself.
Regarding chemical filters af few 'bad ones' have been banned, but for physical, TiO2 and ZnO nano partic…
I was thinking about citrate, as citric acid is easy obtainable, plus it's a polyprotic acid and covers a broad range.
''Simply adjusting pH is more often than not sufficient and creates a self-buffering product.''…
Thanks for your personal view, Perry! Much obliged!
I never heat & hold, but this advice is mentioned on the Making Skincare site
Below what concentration of alcohols, ethyl or IPA (as sole disinfecting agent), would you recommend a preservative in hand sanitizers, by the way?
Aren't alcohols relatively weak on mold/yeast? If so, I would understand the additio…
But I'm still not sure if you're looking for hand sanitizers or a product for surfaces? Just like @Cafe33 writes, if it's for surfaces, you'll find a lot based on hydrogen peroxide alone.
A good working and skin friendly hand saniti…
What about DryFlo? It's a selection of modified starches that've been irradiated, so from a microbiological point of view it's better than foodgrade starch.
I added a document about it. It's available in several DIY shops (Glamour Cosmetics in Italy…
Ok. With stabilizers you mean carbamide peroxide or something?
I've had a homeset for teeth bleaching from my dentist. The dentist makes a special bleaching spoon after he prints the teeth, so the spoon fits perfec…
I agree with @Belassi.
Years ago I made anhydrous whipped body butters and I tried cooling quickly as opposed to slow cooling and never experienced graininess, nor fat blooms. These were small batches though (about 500 grams).
Make sure that the mix…
Potassium sorbate gives me flushing symptoms as well. Even at very low concentrations.
Niacin is also known for giving flushing (niacinamide can hydrolyze to niacin under acidic conditions, although it is said this reaction takes a very long time).
I have no idea how it will work with cetearyl alcohol specifically, or as emulsifier at all. I've only used it for neutralizing carbomers.
This is the answer I…
I would prefer to thicken the water phase of every HIP emulsion, not only Seppic's Geltrap. That HIPe I made with PEG-30 dipolyhydroxystearate would be a whole lot better if I had gelled the water phase, I think. Now the skinfeel is v…
Yes, Zen can in theory go even as low as pH 2. It should also be able to handle the blend Lindsey uses. She just has to try how much Zen gives the thickening she wants.
I've succesfully thickened 3% sodium ascorbyl phosphate, which is…
You're welcome! And thanks for the link, I will have a thorough read as soon as I have time.
Interesting. Now I must say that Lotioncrafter doesn't always provide 100% accurate information, but this indeed is puzzling.
Ah I see what you mean. I can't even find the pH of this product mentioned anywhere? Seems important enough though!
Using this at 2% is quite an electrolyte bomb, doesn't surprise me that EMT 10 can't handle it.
Sterile water means water with no single microbe present (and often, when used parenterally, it is meant that it contains no pyrogens, which are simply said the 'mortal remains' of killed microbes, which can be removed by e.g. a …
I've never heard of this. DIY stores here sell several kinds of (organic) acids, pure and dilluted.
If it was for those safety reasons they couldn't sell alkali like sodium or potassium hydroxide either, which most of them do here.
Parabens can get deactivated by non-ionics, especially polysorbate 80 (and to a lesser extent 20 and 60). I've never heard this about phenoxyethanol.
Here some information from a book called Surfactants in Cosmetics by Rieger/Rhein: