How to Test and Adjust pH - without Sodium Hydroxide! | Cosmetic formulation

This video shows you all the ways to measure and adjust the pH of your cosmetic products.
I am aware that there are many other methods to adjust pH, so have just concentrated on the most accessible ones. For a more in-depth video and supporting information, look out for our ‘Beginners cosmetic formulation course’ which will be linked here when it is launched very soon!
I should have also mentioned that the only reason that I dip the pH strip into the product is that it's part of an example in my course and not being used for anything else, you would not do this in practice, but always put a sample of your product in a beaker and test that :)
Thanks to Dip-Slides.com for sponsoring this video and Skinandhairmanufacturinghub.com for offering a kind discount to customers looking for L-arginine.
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Any advice is researched by ourselves and any formulas and recipes are experiments created for the purpose of sharing on Patreon and KZbin and have not yet been safety assessed. Revega does not make any claims as to their qualifications or the efficacy of the formulations which are shown here for entertainment purposes, and accepts no responsibility for how you use the information given. We are self-taught and offer these videos from our years of knowledge and experience in making our own cosmetic products. Remember that if you intend to use one of these formulations for your own product range, do your own research, experiments, adjustments and tests before using, gifting or selling.

[@TaraLeee]

I was just thinking how I need an updated video of this. How time flys by! Yes, people say not to dilute it with water, but I also found it doesn't change it enough to be a big deal. Love that you raised the pH without sodium hydroxide. It's my go to. So now I can send viewers your way for another option.

[@revegacosmetics]

Thanks for watching Tara ☺️

[@DanielleKelly-fz1io]

Do you still recommend skin and hair manufacturing hub for the L Arginine?

[@skuldarchleone]

You can freeze your water before mixing it with naoh so the solution doesnt get so hot and produce little to no fumes. Mix the naoh slowly, just a bit at a time and stir between mixing

[@revegacosmetics]

Yes, good tip! Still need to be careful though, but this definitely helps, and it does reduce the fumes a lot :)

[@ayunirazali9503]

Do u know how to fix undetect pH of detergent? I tried so many time but it didnt appear anything. I know dat my detergent is mess up

[@florabescansaluers]

I just ordered the extech ph meter a little bit ago (waiting for it to arrive) so thank you for the guide on calibration! I’m excited to see how it works with creams and lotions. How would you know when you need to replace the electrode?

[@revegacosmetics]

I’ve not got to that point yet, but I’m told they can degrade over time/stop working and sometimes get damaged, but I don’t think it needs doing often. Mine has lasted a couple of years so far without replacement.

[@florabescansaluers]

@@revegacosmetics glad to know it’s infrequent, thanks!

[@sweetflakes]

The first meter read 4.64 and the second meter read 6.13 😳 That’s actually a HUGE difference!! 😱 are you sure both meters are accurate?? Bcs it seems to me that one meter definitely isn’t.

[@revegacosmetics]

Possibly. I've come to realise that there often is a fair gap between cream based readers and water based readers. All of the ones I've had over the years have read differently. It could be that they are less expensive readers, or user error. I may not have calibrated it accurately. I have calibrated and used both since this video though, and similar difference. If I was measuring something that needed to be a specific pH then I'd look into it further, but if I'm aiming for a range and both come happily within range then it won't be a concern. However, I do recheck things when I do stability tests to see if there is any pH drift, as if one of the meters showed it creeping out of range I'd then be re-caibrating and re-testing etc.

[@sweetflakes]

@@revegacosmetics one way to know if your meter is accurate is to just dip into your calibration solution & see what it reads. Also, it’s better to store in electrode storage solution (which is usually 3M KCl solution) rather than ph 4 solution. The electrode also needs replacement from time to time. Anyway, thank you for this video! I’m off to go get my hands on l-arginine powder! 😄

[@revegacosmetics]

@@sweetflakes I always calibrate and store as per the specific meters instructions else any warranty is void. Electrodes are replaced when needed, these meters were new. I'll have a look at the solution you mentioned though, for one of the out of warranty ones I have and do some testing.

[@splanet5088]

What is the shelf life of the L-arginine solution?

[@revegacosmetics]

I’m not sure, I normally use it within a month. You’d need to do your own testing.

[@splanet5088]

@@revegacosmetics Okay, thanks. I'll give this a go!

[@nkazimdidimba1953]

❤❤

[@nkazimdidimba1953]

Great video, this was very informative. Thank you

[@nouramy4038]

Bicarbonate of sodium raises ph too

[@revegacosmetics]

Yes it does, this isn't an exhaustive list. Bicarb needs to be selected from cosmetic ingredient stores only so that it doesn't include impurities. You can also adjust the pH up with triethanolamine.

[@nouramy4038]

​@@revegacosmetics ok I didn't know that, thank you

[@ayunirazali9503]

​​@@revegacosmeticscan increase ph using it? I thought it just can lower the pH instead of citric acid

[@revegacosmetics]

@@ayunirazali9503 What are you referring to?