Talk:Hydrophilic-lipophilic balance

I found this kind of Davies' equation HLB = 7 + Є Hh - Є Hl

Є Hh is the sum of Hh (I can't find appropriate sign for the sum)
Є Hl is the sum of Hl

but see the difference! there's a MINUS, not plus! I think we might check some other sources! 213.151.228.223 10:05, 27 May 2007 (UTC)marian