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pH CREAM
Hi everyone, please help me.. i almost give up.
Wanna make w/o cream with pH 6, but my final cream has pH 7,5.
I’ve tried to adjuts with citric acid 10% and 20% BUT the cream losses its moistrure, my cream become dry…. so it’s easy to rinse off water, the fact i wanna make w/o cream that NOT EASY to rinse off water.
I trully appreciate everyone who help me, thanks a lot.
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15 Replies
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Umh….how are you checking pH?
Since the phases are reversed….. you cannot just dip your meter in….and expect a correct result.
I would adjust the water phase before combining…and call it good.
Have you ever considered just making a cationic O/W emulsion, to address your desired outcome?
Good Luck.
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I’ve tried to adjust the pH in the water phase but the result was same, the final pH 7 commas
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You can NOT measure the pH of a w/o emulsion. (There is some debate on certain hoops one can jump through…. but for a basic rule of thumb…. stick with that comment.)
That is equivalent to waiving your pH meter over your head….and saying that is the pH of air!
If you set your water pH correctly….then that should be sufficient. 🙂 Any reading beyond the water phase will not be accurate.
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Just to confirm what @Graillotion said.
The oil is continuous phase and tiny water droplets are suspended in it. So only every now and then the tiny small droplets hit the probe of your pH meter = not enough, not accurate.
As suggested, adjust the pH of you water phase before adding into oil phase. No further testing needed/required/can be done.
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You said the oil is continuous phase and tiny water droplets are suspended in it and only tiny small droplets hit the probe of pH meter BUT the amount of my water phase is more than oil phase, it’s about 60% of water phase. Do I still have to adjust the pH in water phase??
THANK YOU…
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Hi, I thought you said you are making WATER IN OIL emulsion.
So I would assume that water input would be much lower?
If you have 60% of water you are most likely making OIL IN WATER emulsion. (Unless you are making High internal phase emulsion. ?)
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I’m a little confused, does the amount of water phase must always be less than the oil phase if you want to make W/O cream??
BUT I see in some sources either google or not there are many formulas w / o but have a greater number of water phases.
Thank you
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Emulsion type…is determined by the emulsifier.
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Yes… i used some w/o emulsifiers but the total of oil phase is less than water phase.
Is this correct and can still be said w/o cream?
Thank you…
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Correct…..you can have a w/o with a smaller oil phase.
If you truly have a w/o…then you cannot measure pH (easily) beyond the water phase. Whatever reading you get after combining…is an irrelevant reading. Your meter ALWAYS says something…..just wave it over your head, while dancing on one leg, and throwing eye of newt over your left shoulder…..and you will have a reading….but a meaningless one. ????
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Improving Stability of Water-in-Oil Emulsions (ulprospector.com)
ulprospector.com
Ask the Expert: My water-in-oil emulsion is unstable. What can I do?
One of the easiest ways to improve stability is to increase the dispersed water phase to >60%. This increases the viscosity of the emulsion due to internal p
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Many w/o formulas, especially modern ones…have a very low oil content/phase.
It only refers to the orientation of the phases…not the content.
You should still look at cationic o/w’s as an alternative.
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Thanks a lot graillotion for your help!
So, because the amount of my water phase is bigger than oil phase (70% water phase),
is it still accurate if I take a ph measurement at the end of the product?
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No….
Water ratio is irrelevant. Only thing that matters is phase orientation.
Your ONLY option is measuring you water phase…just prior to combining. Typically, that will be very close to your combined phase reading. You cannot dip your meter into an w/o and get a correct reading. Whatever you get…will just be a random number…. much like the number that appears…when you turn the meter on. ????
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Aside from the main question, To identify these two types O/W and W/O, place a drop of emulsion on a microscope and bring it into contact with a drop of water or oil. If it mixes freely with water, it is classified as O/W type. If it mixes easily with oil, it is classified as W/O type.
It would be a good idea to first use HCl as a pH adjuster, and then try various pH adjusters if there are no problems at the desired pH of 6.0. ex. citrate.
Alternatively, it is possible that Citrate was manufactured at a low dilution of 10-20%. Since it mixes with water 1:1 to some extent, I think it would be a good idea to prepare a 50% solution and then use it.
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