Bright Purple Fluorescent colour.
The most important feature of fluorescent colours is that they are much brighter and more noticable than normal colours.
Fluorescent colours also, when combined with other colours, create new and brighter shade possibilities.
Use half a teaspoons of colourant in 500g of soap. Darker colour? Add more colourant.
Other Applications: Nail Polish - Coating - Graphic Arts - Plastic.