[AndrewSeel]

@Bill_Toge I have a zinc oxide w/o emulsion with low HLB emulsifiers, but adding small percentage of Polysorbate 60 has improved the texture!

Is it ok to have Polysorbate 60 in w/o formulation?? 

[AndrewSeel]

@MarkBroussard I made a W/O zinc oxide cream with Low HLB emulsifiers like sorbitan Stearate and oleate plus GMS but has a low consistency so I added 0.5% of High HLB emulsifier and result in good homogenous cream besides Cetyl Alcohol as stabilizers. is it right to include Polysorbate 60 in small percentage??? 

[AndrewSeel]

GMS SE works fine in PH 5.5 when included in water phase O/W

[AndrewSeel]

Hello Simona, Have you solved the problem of recrystallization because i have the same issue 

[AndrewSeel]

transparent hair conditioning oils, leave in product
you can consider natural oils 

[AndrewSeel]

I Add modified starch to stabilize emulsion

[AndrewSeel]

Perry said:

Carbomer.  0.2%
But what you use and how much depends on what else is in the formula.

Perry how do you add Carbomer to waTer phase before emulsification or we should add carbomer gel after emulsification of emulsions like creams?

[AndrewSeel]

ketchito said:

@AndrewSeel No, I meant that PQ-10 performs a bit better than CGuar at depositing oils/silicones. There’s a very nice Dow Corning study about that (http://www.nononsensecosmethic.org/wp-content/uploads/2015/05/silicones-deposition-on-hairs.pdf).

Very helpful thank you

[AndrewSeel]

ketchito said:

AndrewSeel said:

ketchito said:

@ngarayeva001 Hi! Regarding your questions:

1) I believe it’s there to increase the ionic strenght of the water phase, precisely so that oil droplets (like those from cyclomethicone) don’t get trapped in the water phase…you could actually either increase the sodium chloride or add/replace it by magnesium chloride

2) all of those preservatives are actually fairly soluble in water…the parabens you see at the end are all part of a blend (phenoxyethanol, methyparaben,…), although even water phase is what you aim to preserve, being a biphasic product, it would be advisable to ad some oil soluble preservative to the oil phase as well

3)  you could actually reduce your Butylene glycol from your starting formula, since being a solubilizer, it’s the only thing there that makes the two phases combine brifely when shaking them…don’t ad a surfactant, since you’ll create an emulsion instead

I have tried increasing salt but it make the water phase turbid!

Then, you can try reducing the Butylene glycol a little.

I tried many percentages of magnesium sulfate from 1 to 3 % and butylene glycol from 0 to 4% but no positive results; really confused about that

[AndrewSeel]

Can you add ethanol?

[AndrewSeel]

ngarayeva001 said:

@AndrewSeel, what preservative are you using? Some preservatives plus salt cause cloudiness.

i am using phenoxyethanol plus ethylhexylglycerin, 

[AndrewSeel]

ketchito said:

@ngarayeva001 Hi! Regarding your questions:

1) I believe it’s there to increase the ionic strenght of the water phase, precisely so that oil droplets (like those from cyclomethicone) don’t get trapped in the water phase…you could actually either increase the sodium chloride or add/replace it by magnesium chloride

2) all of those preservatives are actually fairly soluble in water…the parabens you see at the end are all part of a blend (phenoxyethanol, methyparaben,…), although even water phase is what you aim to preserve, being a biphasic product, it would be advisable to ad some oil soluble preservative to the oil phase as well

3)  you could actually reduce your Butylene glycol from your starting formula, since being a solubilizer, it’s the only thing there that makes the two phases combine brifely when shaking them…don’t ad a surfactant, since you’ll create an emulsion instead

I have tried increasing salt but it make the water phase turbid!

[AndrewSeel]

ketchito said:

@AndrewSeel That’s tricky. Generally speaking, Polyquaternium-10 might have higher deposition than Cationic guar, but it all depends on the charge density. Nowadays, you have Cationic guars of different charge densities (the higher the charge density, the more deposition). Also, Cationic guar is a bit easier to remove from hair than Polyquaternium-10. Keep in mind that they also help oils to deposit (like silicones), and on that, again PQ-10 performs a bit better than Cationic guar. One strategy to reduce chances of buil-up is to use both polymers instead of only one.  

You mean polyquatrenium 10 will not help in oil or silicon deposition on hair?

[AndrewSeel]

ngarayeva001 said:

@AndrewSeel, in my case it was a problem with the plastic (the bottle)  not the product itself. Try to transfer it to a glass bottle and see if the problem persists. If yes, it’s your formula, if no, it’s the packaging. Do you have any surfactants in your formula at all?

no I do not use surfactants here, I tried to add polysorbate 20 but has not worked well

[AndrewSeel]

Hello @ngarayeva001 @Microformulation
I have the same problem of oil droplet trapped in the water phase, I tried to increase the salt but problem has not resolved, do you have any suggestions can help me out in this point, i used some of non polar oils to enhance the separation between two phases, by the way i have colored the oil phase not the water phase.

Any help will be very appreciated

[AndrewSeel]

Glyceryl Oleate increase viscosity lamesoft PO65

[AndrewSeel]

Pharma said:

A buffer is chosen based on target pH. The required amount depends on the entire formulation or rather the compound which leads to pH shifts.

If you want to have just a one fits it all, your disodium phosphate plus citric acid has a very broad buffering range and might be your best bet. However, it’s two polyprotic acids which may show incompatibilities in some formulations.

Could you explain more by example? If I want a Ph of 5 or 5.5; I am adding 0.5% sodium citrate and Then adjust PH by citric acid, is it right? Is there any references for such values?
also can I add sodium metabisulfite in same formulation contain disodium phosphate?

[AndrewSeel]

hanbit said:

hanbit said:

@ngarayeva001I noticed that you’re a big fan of sodium lactate (saw you mentioned it several times in another thread). I tried adding 3% of sodium lactate to my emulsion, and it doesn’t smell great (sea salt + stale smell combined, I’m not great at describing smell though, but it is not a pleasant smell). The scent did go away after a minute or so but i’m wondering is there a way to mask of the scent without using any fragrances. What is your experiences though?

I did like the way it felt on my skin. And i tried it plain as well, and it definitely surpass glycerin and other glycols in terms of skin feel and moisture. It felt very hydrating without any tackiness (but smells awful)

I wonder about the stability of the emulsion if I add sodium lactate at 2% since it is an electrolyte, my second concern is sodium lactate is a little exfoliant at 2% and wearing this cream and go under sun may give negative impact on skin, also I have a question could we add sodium lactate to shampoo formulations?

[AndrewSeel]

Belassi said:

I have found that the choice of surfactants makes by far the biggest difference in the performance of a shampoo. I can’t comment on your two primary surfactants because I have never used them. 1.5% of CAPB is almost nothing, it seems to me you should check the ASM total % first.
Lamesoft PO-65: It is a softener. I tried it myself in shampoos at 1, 2, and 3%. I no longer use it in shampoo. It leaves the hair “limp”. I suggest you first remove it, see what the result is like. Then try adding 1% of Polyquart H-81 instead (a condensed resin) and retest.

Thank you Belassi for reply, Actually I found lamesoft is useful as softener may be I am wrong, but regard ASM is 10.5, is it enough?
i forget to mention Cocamid DEA 1.5% in the formula also.
how do you think of adding Peg-75 lanolin beside PEG-6 Caprylic capric triglyceride to enhance softness?
I suspect silicon emulsions as Xiameter 0949 will give bad results, do you think so?
Someone advice me to add corn Syrup in the formula, I have not seen similar advice.

[AndrewSeel]

I have to add that I could not find alternative to olefin sulfonate, I consider it equal to SLES in performance so it should not be any problem regard its performance
 in c
Cleaning and foam formation 

[AndrewSeel]

Hello guys again, I almost give up to have a softener conditioning shampoo, I do not know why, my last sulfate free formula was
olefin sulfonate 6%
Sodium lauruyl sarcosinate 3%
CAPB 1.5%
Lamesoft po65 2%
peg-7 capryl capric triglyceride 0.5%
silicon emulsion 0.5%
crambe oil ester 0.1%
glycerin 2%
panthenol 0.25%
amino acids solution 0.25%
lactic acid
ph 6

 Results is not so good on the basis of softness and vitality of hair, hair not well moisturized or glowing. 

I just want to know if my surfactant percentGe not enough or the opposite that it is too much and striped off the oils of the hair.
please help

[AndrewSeel]

Belassi said:

A recommendation: Get some Stepan APB (all purpose blend) and try that. Use CAPB for thickening. About 18% of the blend would be about right. Compare the result with what you are trying to do.

Thank yolu belassi, I will try to find Stephan APB and let you know the results,

[AndrewSeel]

Belassi said:

You have a lot of CDEA in there but I see no mention of pH adjustment, what’s the pH?

Ph 6
but I saw some formula for Croda shampoo putting 3% SLauroyl Sarcosinate+SLES3% plus betain45 5%  with Keratin hydrolyzed.

i feel desperate beCause of lifeless feel resulted in the hair 

[AndrewSeel]

CDEA 1.5%
ph is 6

[AndrewSeel]

Belassi said:

Inadequate amount of surfactants.

Very thankful for your help, so the dry feeling come because of an adequate cleaning effect and solve will be by increasing surfactant percentage, and will still mild formula