This is what the Splash Art kit looks like, it's not wholly visible in my setup shot: http://www.phototrigger.co.uk/
This is my set-up image. The base is a sheet of glossy black perspex which gives a nice reflection whether you use a black bg or a graduated bg with flashes fired through a sheet of opal perspex like in this pic. To get a black bg just take away the rear flashes and stick a piece of black card in front of the perspex and just use the two front flashes. I normally have the camera a bit higher and further forward than that but I pulled it back so it didn't obstruct the set-up view.
The black perspex sheet has a small white tippex spot on it, I move the kit reservoir and manually fire drops until I have it hitting the white mark perfectly. I use s couple of blunt ended syringes filled with different coloured liquids and place a few drops around the white tippex spot before hitting the drop release button.
The Splash Art kit plugs into the remote switch socket in your camera. The kit accurately drops one (or two) of whatever liquid you've chosen to use for the droplet(s). The camera is set to mirror-lock-up, so press the shutter once to lock the mirror up then hit the release button on the controller to release a drop (or two) and the kit fires the camera shutter.
There are 4 dials on the controller, one is the delay dial (most important one), second is the size of the first droplet, third is the delay between first and second droplet and finally the fourth dial is the size of the second droplet.
To freeze the action the flashes need to be set on 1/64th - 128th power, any slower and motion blur starts to creep in.
IMAGE LINK: http://i212.photobucket.com …%202014/IMG_8014-Edit.jpg
on photobucket
Graduated background as the set-up.
IMAGE LINK: http://i212.photobucket.com …Nov%202014/cherrydrop.jpg
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Black background. The black base and bg is simpler to do as you only have to woryy about two flashes. I suppose you could get away with one flash and a piece of white card as a reflector.
IMAGE LINK: http://i212.photobucket.com …s/Splashart/crown_036.jpg
on photobucket
I suppose I'll get some grief for posting the set-up shots because the sun's still shining!

I hope this shows a little insight into how they are created.