Syneresis (leaking) of deodorant stick
This is driving me MAD.
I’ve tried different things with the ingredients I have, and the stick STILL develops droplets on the surface about 24 hours after using it.
I see pooling of liquid on the bottom AND on top of the deodorant material (which I store in a plastic bin, till I want to make a stick of it, with fragrance).
Pooling/droplet formation occur with or without any fragrance added to the deodorant material.
MY CURRENT FORMULA:
6% sodium stearate (OP-200 V from Hallstar, the preferred variety for glycol sticks)
57% propylene glycol
10% dipropylene glycol
4 % Peg-40 castor oil
6% witch hazel (no alcohol in it)
3% isopropyl myristate
HERE ARE THE THINGS I’VE VARIED, WITHOUT A RESULTANT HAPPY FACE FOR SUCCESS:
Polysorbate 80 at 1.5% when scenting the deo. with essential oils, also at 1.5%
1% sodium choride (non-iodized pickling variety). The syneresis looked WORSE.
Sodium stearate OP-100V or OP-200V made NO difference. The OP-200V is supposedly better for glycol sticks, such as what I’m making.
67% propylene glycol (PG) or a 57% PG and 10% dipropylene glycol (DPG)
PEG-40 castor bean oil 2% to 4%
Isopropyl myristate, 3% OR 6%
6% sodium stearate OR 8% sodium stearate
I am limited by the ingredients I can get because I’m just a hobbyist. I DO have these ingredients, if they’d be helpful?
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