A sun care Formula I prepare, every time I get something else.
Once the emulsion O / W and other times it's reverse .
The emulsifiers I use are:
Pemulen TR-1 0.1%
Stearic Acid- 1%
Span 65- 0.1%
PEG 150 Distearate- 0.1%
And I have VP/Hexadecane- 3%
How can I control it-so I got to O / W or vice versa?
What causes the inverse emulsion?