[Chemist77]

@MakingSkincare I have read the link you have posted, I would like to ask if a non-ionic emulsion too renders the preservative ineffective e.g. my emulsion has fatty alcohols, glyceryl stearate and some ester oils. I am not using PS 80.

[Chemist77]

@Herbnerd
Top answer.

[Chemist77]

you have to pour the product at a uniform temperature, should not happen that you are still in the process of pouring and the bulk in the jar or vessel or container starts setting. Read the specs for both the triglycerides, it would give you more clarity. Re the dimethicone I think you can do away with it as its sole purpose is to counter the whitening effect of the salt post drying, or maybe keep upto 0.5 to 1% for application purposes.

[Chemist77]

Its a salt so I doubt it and then there is no surety if they have used a solution or powder. So I still feel it has no role in aiding to the viscosity. 

[Chemist77]

It has 2 thickeners and the silicone oils are for feel and application aid. You can adjust the viscosity by playing with Tribehenin and C18-36 Triglycerides. Secondly they may also claim oil free (which is still a big YES), try to make a base in light of the above ingredients and then add your active. Much easier I suppose. 

[Chemist77]

These gels might double up as viscosity builders as well provided you strike a balance of solvents and other ingredients. Though no harm in trying others as well.

[Chemist77]

 Try dissolving TMS first in cyclomethicone (evaporating solvents like D5), then slowly add the silicone elastomer gels to adjust the viscosity. Keep some solvent free to dissolve your anti-microbial. Try using different levels of gel as in the presence of dimethicone and cyclomethicones these gels tend to liquefy quickly. Try optimizing everything with this skeletal idea.  

[Chemist77]

Well as Robert pointed out you have so many elastomer gels like 9045, 9040, etc. then you have a good one from Momentive too. The name is Silsoft Gel, try optimizing different permutations and combinations. Check the compatibility and solubility of different anti-microbial agents and see where you reach with all this info.

[Chemist77]

I think if I extend Roberts comments then trimethylsiloxysilicate can be tried with evaporating silicones n a little of other things for icing on the cake.

[Chemist77]

@Perry bingo

[Chemist77]

@Perry my guess would be just anything from it because I see some film formers too, I wouldn’t put my finger on anything specific here. If you say it’s silica they might say we have film formers too which act as barrier to the pollutants.

[Chemist77]

PVP/MA Decadiene is the correct name I guess, functionally you can say it is similar to Pemulen.

[Chemist77]

And that’s the irony. 

[Chemist77]

@alchemist If you are going through the proper channels then you have lot of issues for sure. 

[Chemist77]

I think he is ref to the percentage in formula, sci is sodium cocoyl isothinate and the other one is disodium lauryl sulfosuccinate if i m not wrong.

[Chemist77]

@Robert this is most probably in India so I guess not too many issues re the regulatory part until and unless something horribly goes wrong with the product and it is in the market.

[Chemist77]

try distearate thickener, might work.

[Chemist77]

How about putting a label on the products requesting the microbes for a no-entry  

[Chemist77]

Good point that but recently we had a full fledged attack on parabens for disrupting hormones and so on and so forth, what next??????

[Chemist77]

Choose wisely Di or Tetra as per the pH of the product. 

[Chemist77]

@Duncan there are better ways for denial to info but putting it boldly on a public forum is a bit discouraging at times. But as you said it’s all about bread and butter and at times some topping  

[Chemist77]

I guess the original query was about oxidation and more like a chemical phenomenon and if the pigments are not properly dispersed or change complexion on application then it is more of a physical process as the pigments are getting milled and the tint changes from a half milled to fully milled and bloomed. 

But the original question was that given all the conditions have been satisfied, is there a chance that the pigments are going to change chemically on the skin and then change the tint?????

[Chemist77]

Let me guess if someone had to buy this product he/she should have a net worth of not less 500 mil

[Chemist77]

Good one that, going by the ing list I guess it’s that special drink for the immortality  of the skin. 

[Chemist77]

Maybe some light sensitive pigments which oxidize in the sunlight and the skin acting as the base and catalyst both for such color change, purely a guess so discretion advised.