[Abdullah]

Bax65 said:

@Abdullah - that’s an unavoidable issue linked to the manufacturing of the SLS granulate.
To make this easier to deal with a first pH adjustment should be done right at the beginning with only the SLS in water. Then you will have the lowest possible viscosity.
Once you have added a co-surfatant and/or any kind of thickener the foam will stay even longer.
Final pH adjustment can and probably still needs to be done when the formulation is completed.
Do you have the chance to apply vacuum and have a propeller stirrer running on top of the liquid? Idea is that the rotating propeller will destroy the rising foam when vacuum is applied.  

Unfortunately i don’t have vacuum available

[Abdullah]

@Bax65 thanks 
Is there a way to prevent SLS from too much foaming when reducing it’s pH? 
For 100g sample it produces like 500ml foam when i add citric acid to it. 

I don’t know how to handle that amount of foam in large batch. 

[Abdullah]

What is the problem? I couldn’t get it.

[Abdullah]

Your emulsifier also has a big role in your preservative effectiveness. 

Check this file.

[Abdullah]

@chemicalmatt you mean 50% APG which is 25% active surfactant? 

[Abdullah]

@jemolian yes it could be. 
But as sample surfactants like CAPB or SLS %30 are more simple than shampoo because they are only one surfactant and water and they also need Preservative. So it made me wonder if simple surfactant product is just this one surfactant in water or shampoo is also a simple surfactant product. 

[Abdullah]

https://www.makingcosmetics.com/Magnolia-Bark-Extract_p_534.html?locale=en

[Abdullah]

https://www.makingcosmetics.com/Magnolia-Bark-Extract_p_534.html?locale=en

[Abdullah]

When i googled about Magnolia Oficinalis to purchase some and use as preservative there was written preserved with phenoxyethanol. 

[Abdullah]

Pharma said:

1%/MW of Zn*MW of zinc PCA

MW of zinc PCA 321.59484000
MW of zinc 65.38

So 4.9188565310492g of zinc PCA gives us 1g zinc. 
Am i correct?

[Abdullah]

Have you tried Dimethicone/​Vinyl Dimethicone Crosspolymer?

[Abdullah]

PhilGeis said:

I’d not use with sorbate.  No purpose with two organic acids and the benzoic acid/surfactant phenomenon is not found with sorbic acid.

What is this benzoic acid/surfactant phenomenon? 

If i us sodium benzoate+phenoxyethanol +0.2 EDTA in shampoo, What ratio would give best results? 

[Abdullah]

Use phenoxyethanol instead of benzyl alcohol. It is milder, stronger for gram negative bacteria at will grow most in body wash and have less impact in viscosity than benzyl alcohol.

[Abdullah]

An aluminum tube also works for products that are air sensitive in an inexpensive Way.

[Abdullah]

ngarayeva001 said:

It won’t be stable even if you add antioxidants and keep it in freezer. Retinol is utterly unstable. I am talking about actual retinol not derivatives. Tretinoin is even worse.

What makes retinol unstable? 
Water

Air

Heat

Light 
Or something else? 

[Abdullah]

Write the percentage of each ingredient. And how much money you are ready to spend?

[Abdullah]

kconley said:

I’m new to all this and I have a lot to learn. The formula is a body wash and has Decyl Glucoside (and) Sodium Lauroyl Lactylate, and coca betaine as the surfactants. And it has Olive Oil PEG-7 Esters aka Olivem 300 as a solubilizer. I don’t have Olivem 300. I was wondering what I can use instead? I read I can use a Shea Water Soluble to replace the Olivem 300. It’s 3 percent of the formula. Can i use polysorbate 20? Can I make Shea Water Soluble with 50% water and 50% shea. Its a lot of work for 3% of the product.  but I don’t have an alternative on hand except poly 20. 

Use SLES/CAPB 3:1 and don’t to make a good shampoo. You can latter test all that other  stuff to make sure that they are not working. 

[Abdullah]

PhilGeis said:

Follow supplier’s choice for raw material storage.   What are the drums - are they lined?

The drums are also HDPE. 
What do you mean by lined?

[Abdullah]

ngarayeva001 said:

Retinol is often supplied in CCT + antioxidants 

Thanks 
Will it be stable if we don’t add antioxidants?

[Abdullah]

PhilGeis said:

I’m not with my colleague Abdukkah.  You can not be sure the packages are “safe” unless you confirm and control the risk.  That said, risk for Germall is low but, phenoxyethanol may be at risk.  Package size is a critical factor.  
Major guys conduct analysis of preservative in stability, and you should as well.  I understand this may be too expensive for many - so look for precdent - similar products from major cosmetic guys - formula, package composition, esp. size, etc.

Thanks for your information. 
I currently purchase phenoxyethanol in 20kg drums, store them in original package, fill 1kg HDPE bottles from that and use from these 1kg Bottles in my products. So what materials are safest for phenoxyethanol to be stored in? 

[Abdullah]

Lotion suppliers use HDPE  and PET plastics and raw material suppliers use these two for raw preservatives. Mine uses HDPE. These are the most common. So you can be sure thse two plastics are safe. Other plastics are rarely used. 

[Abdullah]

This stock of ingredients that you currently have, have you made any facewash with all of them in it without color change?

If no and some of these raw materials you have purchased recently and use it for first time then the problem may be in that particular batch of that raw material. 

If yes then maybe the equipments was contaminated with something with color. 

Have you made this face wash again in another (preferably clean plastic) equipment and saw if the color change or not?

[Abdullah]

What are the complete list of your ingredients, what amount each and what is the final pH. 
That way we can know what is happening.

[Abdullah]

Decyl Glucoside is not a strong foaming. Use SLS or SLES for strong foaming and some CAPB if you want mildness. Use silicone or polyquats for conditioning.
Cleansing Products does not moisturize the skin. Use moisturizer for that purpose. 

[Abdullah]

Openion i mean