Water/milk drop collision... plain milk falling into plain water. No dyes or PS trickery used, all of the colouring comes from the flash units.
Must be seen Large On Black.
Sorry I haven't uploaded in ages, I *finally* got some time to hack together a wired dual flash remote and set up some water drop shots. This is one from this session -- more to follow I'm sure!
- Vivitar 285HV flash @ 1/16 power, blue gel, at back behind frosted perspex sheet.
- Vivitar 285 flash @ 1/16 power, orange gel, from left side.
- Camera at F8, 2sec exposure, flashes triggered manually.
- PS: tweaked levels, sharpened, cropped.
A photo of the setup for this can be found HERE.