Non so se può servire ma io avevo trovato questo:
Link
"PHYTOSTEROLS can be used in cosmetics either in their free form
or as esters. The free sterols are W/O emulsifiers and can increase
the stability of both W/O and O/W emulsions. Since they have a
rather low solubulity in plant oils (less than 5%), only smaller concentrations should be incoroporated from the free sterols to avoid
possible recrystallisation. PHYTOSTEROL ESTERS, on the other
hand, are almost freely miscible with plant oils and can be used to
increase the viscosity of lotions and creams and give them a shiny
appearance. Commonly, PHYTOSTEROLS are used in creams in
concnetrations between 0.5%
and 2%. PHYTOSTEROL ESTERS should be used in higher
concentrations up to 5%."
Io i fitosteroli di GC li avevo inseriti allo 0,5% in fase b con 10% di grassi, scaldato ad 80° e non ho notato residui nel becher.
@Marins, che dosi di fitosteroli e oli hai usato?