[ozgirl]

If you are getting separation when you are working with small volumes this will be an even bigger issue with bulk production.

I am guessing that something in your formula is not compatible with your polyox resin. Maybe somebody who has worked with these resins can give you more insight.

[ozgirl]

Here are some links that might be useful.

http://ec.europa.eu/consumers/sectors/cosmetics/files/pdf/periodafteropeninglabel_qa_2005_2_en.pdf

http://microsites.schuelke.com/wet-wipe-preservation/documents/Period-after-opening.pdf

[ozgirl]

In response to Perry’s original question I would love to have someone investigate and develop a preservative that:

• is broad spectrum
• does not contain parabens, isothiazolines or formaldehyde releasers,
• is stable over a wide pH range,
• is suitable for use in all emulsions, surfactant systems and water based products,
• is not plagued with the issues that some of the other preservative systems are prone to such as emulsion instability or interaction with ethoxylated and non-ionic materials. 

and if it could be derived from a renewable plant source that would be amazing.

This would save me so much time trying to find a preservative that meets “natural” customers expectations and is stable in each formulation.

[ozgirl]

I have a formula with similar surfactants that also goes through a ‘gel’ type phase at around that pH.

What happens if you reduce the pH down to around pH 5.5. Does it thin down again?

[ozgirl]

From memory I think that the addition of the methyl group allows you to make clear products as opposed to only opaque products with the non-methyl isethionates.

[ozgirl]

I would try removing the Tego betaine and increase your emulsifying wax.

What were you hoping to achieve by adding the betaine?

[ozgirl]

I often use it to see how they rate certain chemicals. I do this not because I think that the information they provide is necessarily correct but so that I can see what information (or misinformation) customers would get if they searched.

[ozgirl]

Looks good to me. A comprehensive overview of the topic

I had no problem with the sound.

[ozgirl]

Castor oil may be causing the problems you are experiencing. I have heard that it can be drying and irritating in lip formulations for some people.

http://dermnetnz.org/reactions/lipstick-reaction.html

[ozgirl]

 As @Bill_Toge has mentioned above if you want to create products that are based on synthetic and petroleum based ingredients it can be done but if you are concerned about palm oil I am assuming that you would be trying to create a more “natural” type product.

Developing cosmetics that are palm free is certainly much more difficult and definitely more expensive than using palm based ingredients especially if you want to create emulsified products such as creams and lotions. Making anhydrous (balm type products) products can be done relatively easily without using palm oil based ingredients but this severely limits the types of products that you can develop.

There are definitely a number of businesses incorrectly making palm free claims in Australia. Some of these are due to smaller companies relying on information from one supplier that incorrectly claimed that an emulsifier was palm oil free. This supplier no longer sells this emulsifier. 

[ozgirl]

@nitana I came across this when I was looking for something else and thought perhaps you could make something like this formulation with your zinc oxide.

http://www.biochemica.com/formulations/BCI0605.pdf

[ozgirl]

I am no expert in this area but I could not work out why you are using PEG-40 Hydrogenated Castor Oil. PEG-40 Hydrogenated Castor Oil is a solubilizer.

Here is a hair pomade formulation which I found that might give you some ideas
http://www.biochemica.com/formulations/BCI0711.pdf

Hope this helps

[ozgirl]

I think a cream or gel would be the preferred method of delivery for this type of product.

[ozgirl]

What is the type of formula?

[ozgirl]

@David My only guess is that it is an anhydrous formulation but that isn’t what I personally would consider a body lotion.

[ozgirl]

I was thinking the same thing about usage rates.

[ozgirl]

@ DavidW Thanks for the suggestion but we are also trying to stay away from parabens and formaldehyde releasers because these products are aimed at the natural market.

[ozgirl]

@Belassi Thanks for the information. I didn’t even think about it having an effect on the foaming.

I am still waiting for for my samples.

[ozgirl]

@thebrain

Here is a technical brochure that compares the sequestering values of Dissolvine GL with EDTA and NTA (page 7)

http://www.subsport.eu/wp-content/uploads/2012/05/AkzoNobel_Gl_Technical_brochure_tcm108-40030.pdf

Hope this is useful.

[ozgirl]

Perhaps you should look at something like Lamesoft PO65 (Coco Glucoside (and) Glyceryl Oleate) instead of oils. It will be much easier to incorporate.

[ozgirl]

Thanks @MarkBroussard for the reminder about the polysorbates.

Has anyone tried these preservative systems (or similar) with hydrolysed wheat proteins? 

[ozgirl]

What concentration of surfactants are you using? It won’t thicken if you have insufficient surfactants.

Have you also tried adding some cocamidopropyl betaine?

[ozgirl]

Have you tried salt (sodium chloride)?

[ozgirl]

You will need to provide more information if you want help. What surfactants are you using? At what percentages?

[ozgirl]

BASF also have a range of pre-mixed pearlescents (Trade Name - Euperlan). Unfortunately I don’t know where these are available to purchase in the US but someone might be able to help.

Are pearlized products still popular in the US? In Australia they have gone out of fashion and very few of the shampoos actually contain them.