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ozgirl said:

The stability of a pearlescent is influenced by the viscosity and density of the liquid and the particle size of the pearlizer. You can read up on stokes law for more information if you want the science behind it.

I have always had better luck using a commercial pearlescent than trying to add EGDS.

Hi there, thanks for the suggestion, I’ll try to increase the viscosity. Can you name the commercial pearlescent that work well for you (brand of commercial name if that’s OK)? I am planning to obtain Euperlan PK from BASF tho.

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Chemist77 said:

Lubrizol lists some great formulations of this kind. You will a lot of help there. 

Hi, thanks for your answer. Yes, you’re right, I’ve used their formulation too, but the pearlizer still separate to the top. I’m wondering what is the common cause for the pearlizer (EGDS) to separate to the top.

Gunther said:

I think you should neutralize lauric and myristic acids with KOH separately, to avoid KOH reacting with other ingredients.

You may wish to use a premade commercial pearlizer instead of EGDS.

0.2% is a bit high. 0.1% will work fine.

Hi, thanks for your answer, I usually have this preheated in separated glass:
A: Lauric acid, myristic acid, water

B: KOH, glycerin, EDTA, hydroxypropylmethylcellulose

When they reach 160-170F, I mix them together and let them saponified for 1 hour in that temperature. After that I let the temperature decreases to 120F and mix in the rest of the ingredients: PEG-7 Glyceryl Cocoate, SLES, EGDS.

I’m wondering what is the common cause for the pearlizer (EGDS) to separate to the top.