Couple of questions... I'm learning the Refractive matching process to create crystal clear products, is there any other way other than using a Refractometer to guage the RI of water & oil phases? (eg; a mathematical equation like the HLB Calc) or am I just looking at trial and error and adjusting amounts of ingredients.
It's for W/Si microemulsions btw.
Can anyone point me towards a supplier for Ethylene/Propylene/Styrene & Butylene/Ethylene/Styrene Copolymer?