[Aniela]

Hello,

1: No idea here, as I prefer my deo’s pH to be ≤5
2: Same here, as I don’t use ZnO because I want to avoid any colour transfer on dark clothes

3&4: this article might shed some light https://pmc.ncbi.nlm.nih.gov/articles/PMC9137363/

5: I wish I could be of more help, but still learning…

[Aniela]

Hi,

You know by now that a question like that would only receive answers if all the details were given, right?

An increase in any of the ingredients you’ve given could work or not, depending on your whole formula.

[Aniela]

Hi, I’m not familiar with benzoyl peroxide, but you have on this page quite a few formulae, plus the complete ingredient lists (when you click on a formula)- this might help you discover what’s missing in your own formula. https://incidecoder.com/search?query=Benzoyl+peroxide

[Aniela]

Still on my learning journey, so I have some questions, please😇

While I do understand your wish for a clear product, why do you consider your preservative system a good one? Does it really cover Gram+, Gram-, yeasts&molds?

And why no use of a chelating agent?

[Aniela]

Hello, I assume you forgot to post the ingredients and your possible approach to create the product. The more specific the question, the higher the probability to receive useful comments.

[Aniela]

Forgot to add something: 1. I’m using in my product only surfactants accepted in “naturals”, and just because I’m familiar with them. 2. My suggestion only applies to manual washing, no idea of the ASM in dishwasher liquids.

• This reply was modified 3 months, 1 week ago by  Aniela.

[Aniela]

If I’m right (not an expert), the ASM in your product is close to the one for a face cleanser.

I make a dishwashing paste for personal/family use which works quite well, and the ASM in it is 50.

I’m not familiar with the surfactants in your formula, but aiming for a higher ASM would be my first step.

[Aniela]

Hello, you could start here https://chemistscorner.com/different-water-used-in-cosmetic-formulating/

[Aniela]

You might find some answers here https://chemistscorner.com/cosmeticsciencetalk/discussion/my-first-aha-bha-toner-bombed-any-suggestions-for-what-i-did-wrong/

chemistscorner.com

My first AHA/BHA toner bombed: Any suggestions for what I did wrong? - Chemists Corner

Hi, all.Below was my recipe:Phase ACombine the glycerin, water (brewed white tea, basically), green tea extract, coffee seed extract, and sodium phytate, and then added…

[Aniela]

Thank you @chemicalmatt ,

Indeed I didn’t make any attempts to it- so I will see what can I source here from what you’ve suggested.

Much appreciated.

[Aniela]

Thank you, Dr Geis

For both, the answer and the article.

[Aniela]

Hi, forgot to answer😇

What I was trying to say is you have to post the whole formula when asking a question like that, as it usually gives a good image about what’s going on. Also it is very helpful to share what have you tried (and didn’t work) to solve “the issue”.

In other words, nobody is inclined to waste their time guessing, so be as precise as you can, and give as many helpful details as you can.

[Aniela]

@PhilGeis Thank you, very much. I will check the colour and ask the supplier as you suggested. Now I’m going to read the article. Wishing you a good week🙂

[Aniela]

Best of luck with your deo😃

[Aniela]

Hello @PhilGeis ,

My supplier sells a liquid preservative, comprising of: aqua 55%, sodium benzoate 30%, potassium sorbate 15%; pH is 8.8-9.8.

Coming from a “natural” school, and after reading ALL comments/posts on this forum on preservatives, I might become a bit paranoid, but I feel like I want to understand everything: does your comment above applies to this combination as well? Or this combination is stable and can/does act as a preservative?

Thank you, indeed.

[Aniela]

Hi, if I were you, I would take into consideration @PhilGeis‘ comment (more so, I would ask Dr Geis for preservation advice- after I’d have put together a formula, preservative of choice included).

Also, “everything is ok” is a less-than-ok statement, as long as you didn’t perform any relevant tests- beginners and professionals alike know that most of the “nasties” can’t be seen with the naked eye.

[Aniela]

Not sure if it helps, but I’ve found this in my notes: “PPG-15 Stearyl Ether also prohibits salts from crystallizing in a formulation. PPG-15 Stearyl Ether can have some side effects such as minor skin irritation. Therefore, a patch test is recommended prior to usage.-specialchem”.

[Aniela]

Thank you.

[Aniela]

This is their guidance, Dr Geis: “The infinitely reusable bottle comes with three tablets that, once dissolved in hot water, create up to 300ml of cleansing shampoo. This is a refill. It cannot be used on its own. Before use, take your Avril refill bottle and add hot water up to the mark. Then add the 3 tablets. Leave the cap open and wait 12 hours. Close the cap and shake to mix. Your shampoo is ready to use!”

Regarding the sodium bicarbonate and the pH, they also have citric acid in there- does that make any sense?

[Aniela]

Even it is in tablet form, it is not as difficult as it looks.

I would start with a powder form- it can be pressed later in tablet form.

You just have to use enough % of surfactants, as to have in the shampoo “portion” the right ASM.

You do know the ingredients, so I suggest you analize them one by one and when it starts making sense for you, design a simple formula and take it from there.

You do not need any emulsifiers.

[Aniela]

Hello @ketchito ,

May I ask you a question, please? Maybe a silly one, but… you live, you learn😇

If Tinogard TL “protects from UV-light induced decomposition reactions and thus prevents fading or discoloration of products that are exposed to light”, does that mean that it’s action can expand beyond the product containing it? Would it bring any protection for say hair, or it will be already spent in the product?

Thank you.

[Aniela]

No chemist either, so no worries.

It would be great if you read this first, it might answer to some of your questions.

https://yeserchem.com/unlocking-the-secrets-of-dishwashing-liquid-formula/

[Aniela]

Thank you. Have a lovely weekend🙂

[Aniela]

Thank you for taking your time to answer @fareloz

Still, another question, please: The Ordinary says to apply the oil suspension even on top of a different unhydrous product. Considering that oils “keep the water in”, would your previous answer be valid for this situation too?

Thank you.

[Aniela]

Thank you @Graillotion -pretty late because of some things going on, yet the same appreciation and gratitude for taking your time to help.