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Troubleshooting Warming Clay Mask
Hi,
I am working on a warming clay mask. It is thick, anhydrous and when it comes in contact with water it warms up (because of the magnesium sulfate). I like the way it feels on application and the warming effect is great but the problem is that after a few weeks at RT and 45C, there is some separation on the top (thin clear liquid starting to sit on the top of the formula). Are there any recommendations on what I can try to correct the stability in terms of the ingredients or procedure?:
Part % Ingredient 1 45.3 PEG-8 0.4 Hydroxypropylcellulose 2 1 Dermol 25B 1.5 Dimethicone (350cst) 0.5 Polysorbate 20 20 Kaolin 5 Talc 1 Silica (highly absorbent grade) 25 Magnesium Sulfate 0.2 Propyl Paraben 0.1 Methyl Paraben 100 Procedure:
1. Disperse hydroxypropylcellulose in PEG-8 using a dispersator.
2. Add Part 2 one by one while mixing with the dispersator.
3. Mix well until homogenous.Thank you for your help.
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2 Replies
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I would increase polysorbate 20 or add some glyceryl stearate or stearic acid.
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Think it is the silicone which would need a higher dosage of emulsifier, try one without the silicone or by reducing to 1/3rd.
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