[Abdullah]

@vitalys thanks a lot for detailed information. 
You didn’t say anything about This one.
Does ingredient from an emulsion penetrate the skin in the same ratio as it is in emulsion or the emulsion breaks down and each ingredient penetrate at different rate?

For example 
A lotion 
5% petrolatum

1% beeswax
0.3% retinol 
0.3% xanthan gum 
2% glyceryl stearate

2% Polyglyceryl 6 distearate
2% cetyl alcohol 
1% glyceryl oleate

1% phenoxyethanol+caprylyl Glycol
Citric acid
Water 
pH 5

If penetration happened, does these ingredients from this lotion all penetrate in this ratio that they are in the emulsion or the emulsion breaks down and some ingredient like retinol and glyceryl oleate penetrate more and others like xanthan gum, petrolatum and beeswax penetrate less if at all?

[Abdullah]

@chemicalmatt thanks

[Abdullah]

@Pharma thanks

[Abdullah]

@Pharma for me the most important factors about emulsifier is 1. working pH range, 2. ease of use, 3. cost per product and 4. skin feel. 

I currently use Polyglyceryl 6 distearate. It works well at pH 4 and above. Only one % emulsifier is enough. No co emulsifier needed. Can make low viscosity and high viscosity emulsion by adding fatty alcohol. 

I saw SSL is 1/3 the price of it so i thought i check it if i can replace it to reduce the price more. 

What emulsifier do you suggest which is better in above 4 aspects?

[Abdullah]

RedCoast said:

I can think of several questions:

1. Whether applying antioxidant serums before applying sunscreen actually slows down skin aging/sun damage.
2. Whether adding antioxidants in sunscreens helps slow down skin aging/sun damage.
3. Whether applying antioxidants twice a day is even sufficient. It’s entirely possible the antioxidant “network” could get exhausted. It may be 3-4x a day (or more) for maximum benefits.
4. Whether applying antioxidants even “works” at all, and if so, would the formulation be too difficult/time-consuming to use or apply?
5. Whether ceramides in micro- or nanoemulsions (with or without other sufficient penetration enhancers) would actually help those with atopic dermatitis and other skin conditions… and whether they are still inferior to petrolatum and other well-established ingredients.

Okay… maybe they’re not basic questions, but this is something that’s been bugging me for a while. Particularly since Skinceuticals released their Vitamin C serum.

@@RedCoast low pH stimulates the body to produce ceramides. 

[Abdullah]

One ingredient is cream base. It means they are hiding. What is inside that cream base?

Also the name of these herbs, they don’t say if they are essential oil, extract, powder, water, color or what.

[Abdullah]

@Pharma i also use dimethicone 5cst.
Zero soaping at 3% SSL????

[Abdullah]

@Syl thanks 

[Abdullah]

@Pharma thanks 
I asked about safety of it because i was wondering if it is such effective emulsifier and thickener (thick cream with 2% SSL without any other thickener) at low pH, and very good price, why everyone is not using it? 

[Abdullah]

@PhilGeis thanks

[Abdullah]

@PhilGeis @Perry

[Abdullah]

@Perry thanks

[Abdullah]

@PhilGeis thanks 
What about ALS? 

[Abdullah]

@PhilGeis for how much time? 

[Abdullah]

@Perry thanks 
Were they using SLS powder or liquid? 
I use SLS powder and for 10% SLS i need 8% citric acid powder to reduce the pH to around 5. 

[Abdullah]

@PhilGeis it will be open when vassel during spring alcohol. Do you mean if i close it after spraying i will approach flammability? 

Yes i can use hot water. 

[Abdullah]

@PhilGeis which surfactants increase the pka of organic acids? 

What is the lowest pH at which SCI and sulfosuccinate can work properly? 

[Abdullah]

@PhilGeis how should i use alcohol? 
I mean is it ok to put some alcohol on a garment and apply to surface of tank or any other method? 

How should i sanitize the 2 meter pipes? 

[Abdullah]

@Perry thanks. 
Obviously it may be mild enough for scalp. So SLES/SLS without CAPB can also make a mild surfactant.
what would the ratio of SLES/SLS be to make it mild?

[Abdullah]

@Graillotion what cationic surfactant were you using? 
Was it unstable without water phase thickener? Because cationic lotion i see in internet don’t have water phase thickener. 

[Abdullah]

@ketchito that is interesting. I should try and see that.
What about other amphoteric surfactants like lauryl Hydroxysultaine? 

[Abdullah]

@ketchito you mean this shampoo is preserved in pH 6 with sodium benzoate? 
What do you say about stability of CSI and sulfosuccinate in pH below 6?

[Abdullah]

@zetein yeah in the past they used coco betaine but in some new formulas there wasn’t any amphoteric.

Maybe i am wrong but as i know SLS and SLES doesn’t make structured system. And this doesn’t have any other surfactant. 

[Abdullah]

@Sincityfire  i really like CSI and disodium laureth sulfosuccinate but the supplier say they are stable only in pH 6-8. I work in pH 5. I don’t know if i should trust these informations.

[Abdullah]

@Perry
1. is there any general rule that what types of surfactants need high amount whater phase thickener what what type need less or not at all?

2. What factors influence the need for water phase thickener in emulsion?

3. How to reduce the next for phaterphase thickener with non-ionic Polyglyceryl 6 distearate as emulsifier?