Other parameters known to affect the result to a significant extent is the volume fraction of oil and the amount and type of emulsifier. Experiments reveal (Taisne et al., 1996; Narsimhan and Goel, 2001; Floury et al., 2004b) that severe (re)coalescence can be found and that the extent is closely linked to homogenization pressure and emulsifier. As coalescence is a second order process, whereas fragmentation is usually considered first order with respect to drop concentration, a higher volume fraction of oil will increase coalescence relative to fragmentation.