[ngarayeva001]

@Max I am not a chemist, but reviewed ingredients lists of many baby products. What they usually mean by tear free is sulfates free.

[ngarayeva001]

@Normasegovia55 you will not be able to avoid ‘synthetic’ chemicals even if decide to live in the forest. Also it is mentioned multiple times in many different discussions of this forum, natural does not equal good. Poison ivy is natural. Try mineral cosmetics, it has less of what you call “synthetic chemicals’, but eggshells are definitely not a good replacement for a setting powder.

[ngarayeva001]

@Normasegovia55 I am scared to imagine how eggshell applied as a powder might look ? Were those white eggs, brown eggs or a blend? Everything is a chemical, including water and air. Check nutrition facts of what you eat and you will find polysorbste 80 and xantham gum. Even worse, you will find parabens. Jokes aside: https://youtu.be/VftruorG9ZQ

[ngarayeva001]

@Microformulation my understanding was that change of the color (even minor) means oxidation. I left 20% solution in the room temperature under a direct light  and it started changing color after 9 or 10 days. The same solution (same batch) stayed absolutely clear for about two months in the fridge. The Institute of personal care science also suggested that change of color means oxidation (may be they are not a legit source). I personally used many different vitamin C serums before I started formulating and saw them changing color pretty quickly (some already were yellow when I opened them). Please let me know if observation of the color isn’t sufficient. Again I am not suggesting that derivatives are not good enough, and I am using MAP in some of my serums. I just know that 20% LAA makes skin brighter after just a couple of weeks of use. Frankly, I have not seen such a result even after 1% of retinol. This is the reason why I believe that the product above (or making small batches) might be a good idea.

[ngarayeva001]

Oh I see. Add citric acid in the very end of the process. pH 6 is enough to be tear free. I feel that 7 is a bit too high. I usually make a very concentrated solution of the citric acid in deionised water (it doesn’t typically need a preservative as the pH of the concentrated solution is 1) and then add it by drops. It allows to control the final pH.

[ngarayeva001]

If the product is for personal use, I would say that LAA serum can be stored in the fridge for 7-8 weeks in airtight container withough any signs of oxydizing. I make tiny batches for myself and keep it in the fridge. Regading the commercial products, check out what Clinique did:

https://www.clinique.co.uk/product/18919/43382/skin-care/fresh-pressed/fresh-pressed-7-day-system-with-pure-vitamin-c

[ngarayeva001]

@em88, the optimal absorbtion of LAA by skin happens at a concentration of 20% and pH around 3. As far as I understand it will not do the job at pH of 5.

[ngarayeva001]

What is  %W/W of your surfactants?

[ngarayeva001]

@Tattvas, this is a bit strange, because with my formula pH is usually around 8.5 and I add citric acid to reduce it. Can you post your updated formula? Another way to elevate pH is adding Triethanolamine, but there are certain restrictions regarding the % that can be used in the EU and I am not sure about usage of it in baby products. Again it shouldn’t be that low. Also, you don’t need to bring it to 7, 5.5 is ok.

[ngarayeva001]

Also, if you don’t mind using silicones in your formula, you can try to adding some PEG-8 Dimethicone. It is a water soluble silicone. It gives a very nice feel to surfactant products.

[ngarayeva001]

This is cold process formula. Cetyl Alcohol is not really required for it. It is not drying and absolutely tear free. I think you have a bit too much of oils (you can increase to 5% is you want). Fragrance is not reccommended for baby producs. There are some researches that show adverse effects of phenoxyethanol on baby rats (not on adult animals though) and I personally believe that parabens are safer, as they are more researched. Glycerine is too low in your formula. You can reduce to 10% if 15% is too much. % of surfactanct in baby product should be below 10%. Check with your supplier but usually surfactants you use have this %W/W: Cocamidopropyl Betaine - 30-38%, Decyl Glucoside - 50%, Coco Glucoside - 45-55% @Tattvas

[ngarayeva001]

 Try something like this:

Aqua – 56%

Oatsilk – 1%

Glycerin – 15%

Xantham gum – 0.7%

Cocamidopropyl Betaine 10%

Decyl Glucoside – 3%

Coco Glucoside – 10%

Almond oil -3%

Citric Acid -qs

Paraben DU (Propylparaben,
methylparaben, diazolidinyl urea, propylene glycol) – 0.4%

[ngarayeva001]

So I ended up breaking my stick blender. Ordered another one with variable speeds, not sure it will change anything though. All overhead stirres below $1,000 are for low viscosity products..

[ngarayeva001]

Parabens.

[ngarayeva001]

Just keep in mind C, E and ferulic combination is patented.

[ngarayeva001]

@Beeehappy Please post the formula with INCI names (not just ewax) because now it’s absolutely not clear how this can have such a low pH.

[ngarayeva001]

@Belassi the problem is, it doesn’t matter if you mix Aristoflex manually or with a kitchen stick blender it bubbles like a surfactant. Sepinov is slightly better but still incorporates air (both manually and stick blender). Regarding Sodium Carbomer, it is preneutralised, but the cool things about it is that it can be added in the end of the formulation to control viscosity (instead of hydrating it separately what I do now), so I wish I could use it like this. Also silica powder doesn’t mix manually. I am ready to invest in a stirrer, but since I am not a professional I don’t understand what is the cheapest sufficient option for such small batches. And also I would reeealy want to keep it within $1,000.

[ngarayeva001]

@Bill_Toge I am not saying that EOs should not be used at all. I am adding them to shower gels and (Less concentration) to body product. But I don’t think that it is worth taking the risk and add them to face products. The safe concentration would be so low that they won’t have any benefits anyway. Again it’s just my opinion.

[ngarayeva001]

Thank you very much @Bill_Toge. I am currently trying to adjust a stick blender (remove the head) so that it creates a vortex. Let’s see if it works.

[ngarayeva001]

Guys, I just want to emphasize, the research paper shared by Perry above says that all EOs are either citotoxic or phototoxic or both. And some of them reduce sensitivity to antibiotics. Which means they are not ok for leave on products. They might have some benefits but it doesn’t compensate for the side effects.

[ngarayeva001]

What about airtight container?

[ngarayeva001]

I can only add one word: Niacinamide.

[ngarayeva001]

@MaisR have you tried Sucragel?

[ngarayeva001]

@RhondaHaupt if you are trying to create clear oil-gel you can try material called Sucragel. It is “natural” (sugar and glycerine) and will keep the product clear. 25% of sucragel and 75% of oil will give you clear oily gel.

[ngarayeva001]

Thank you @ZivBA