[Abdullah]

Where did you read that? 

I think good ratio is 1:10 DEA: SLES

[Abdullah]

If you use sunscreen everywhere Everytime, when and how would you want to get vitamin D? 

[Abdullah]

Sometimes manufacturer just change the name, color and scent and call it a new product. If this new product sell better because of its story then they discontinue the previous one because they know these two are the same thing. 

So you can ask the manufacturer what alternative do you have for this product. See if that alternative also has the ingredients that Perry mentioned. 

[Abdullah]

@Isabella9667 you mean mix it well before each use and don’t sell it? 

[Abdullah]

It is not cold processable. 
It is not inexpensive. Price is 7x more that phenoxyethanol and 2x more than Paraben.

I think it will be very popular in the future. 

[Abdullah]

@zetein how? Can you explain a bit! 

[Abdullah]

@vitalys and what is that barrier doing?

For example if the barrier is attracting water we call it humectant.
If the barrier is preventing water loss we call it occlusive.

What should a barrier do to call it skin protectant? 
If protection then protection from what? 

[Abdullah]

@zetein exactly

[Abdullah]

@Perry so these surfactants will stick better to skin at which pH?

Cationic surfactants at pH pH 5.5 or 4?

Anionic surfactant at pH 5.5 or 4?

Or does anionic surfactant stick to skin by electric charge at any pH or not at all? 

[Abdullah]

@Syl maybe for a few months

[Abdullah]

@ketchito Yes what you said is correct. But my main question was what is the definition of skin protectant and what should an ingredient be able to do to call it a skin protectant.
Any comments on this! 

[Abdullah]

That is very low and that much is good

[Abdullah]

DaveStone said:

Abdullah said:

tretinoin may make it dry. 

One reason can be lipid loss. 

One reason can be a disease.

One reason can be your mild cleanser. What are the ingredients of this?

Try to use low pH moisturizer and products. pH 4 or below.

The cleanser I’ve been using lately is Cerave: Aqua / Water / Eau, Cocamidopropyl Hydroxysultaine, Glycerin, Sodium
Lauroyl Sarcosinate, Peg-150 Pentaerythrityl Tetrastearate, Niacinamide,
Peg-6 Caprylic/Capric Glycerides, Sodium Methyl Cocoyl Taurate,
Propylene Glycol, Ceramide NP, Ceramide AP, Ceramide EOP, Carbomer,
Methylparaben, Sodium Chloride, Sodium Lauroyl Lactylate, Cholesterol,
Disodium EDTA, Propylparaben, Citric Acid, Tetrasodium EDTA, Hydrolyzed
Hyaluronic Acid, Phytosphingosine, Xanthan Gum.

Before that I used Dove Beauty Bar, which is what I use on the rest of my body. The PH of that is apparently 7. I read some online sources that claim Cerave’s PH is 5.5.

Us that Dove or a face wash with more anionic and less amphoteric surfactant to wash your face too and see if it gets better. 

I haven’t used sultaine at high levels but CAPB at high level can cause skin to become dry and then very oily in reaction. 

[Abdullah]

@vitalys i mean 5% petrolatum prevents 98% TEWL and dimethicone only 20-30%. So how 1% dimethicone is skin protectant and 41% petrolatum isn’t? 

[Abdullah]

tretinoin may make it dry. 

One reason can be lipid loss. 

One reason can be a disease.

One reason can be your mild cleanser. What are the ingredients of this?

Try to use low pH moisturizer and products. pH 4 or below.

[Abdullah]

@Perry can I ask a question!

Does isoelectric point mean a pH that pHs above that has negative charge and below that has positive charge? 

For example isoelectric point of skin is about 4.8. does it mean at pH below 4.8 like pH 4 the skin will have positive charge and at pH above that like pH 5.5 the skin would have negative charge? 

[Abdullah]

@Paprik @vitalys how can 1% dimethicone compet with 30% petrolatum for TEWL? 
Skin protection maybe something else. 

[Abdullah]

@CedarS thanks

[Abdullah]

thanks @CedarS 
Does your shampoo have cationic polymer or silicone? 

If yes which one? 

[Abdullah]

Thanks Perry

[Abdullah]

@Perry @ketchito thank you both.

Also how many pages does your book “Principles of Polymer Science and Technology in Cosmetics and Personal Care” has? 

The version i have has 667 page’s

[Abdullah]

Thanks @klangridge 
That was very helpful. 

[Abdullah]

They are not the problem. 
The problem is too much betaine, DEA and silicone

[Abdullah]

sanamine said:

Abdullah said:

It is about 75% active

75.428571428571%

Thank you very much Abdullah. So, if i didn’t a mistake i suppose full resultants are : 
Active content is (75%)
Sodium sulfate approximately (2%)
Water is (23%)

Important is active surfactant. 
There maybe other things too. I don’t know. 
You may add preservative too

[Abdullah]

@Perry thanks 

What about scalp?