This photo shows a water drop collision, using an electronic water drop. The water is thickened with Xanthum Gum to give a better consistency and is coloured with food colouring. I also used milk to control the opaqueness. The water drop was coloured with blue and the reservoir under the dropper was coloured orange. These two colours started to mix in the reservoir, giving the effect captured in the image. I used a macro lens and a single off camera flash. The background was a green/ yellow gradient printed on to A4 paper.