Rolkem Gel Lumo Paint (15ml) Rolkem's range of edible gel colours use a unique gelling agent that means the colour does not fade, and the colour remains consistent until the last drop. Rolkem's unique lumo powder colours are the only edible luminous colours available on the market. This unqiue feature is a result of riboflavin (Vitamin B2) being added to colour pigments to create the luminous effect. Because of the Riboflavin in the gel paint, the additional of ultraviolet light makes the product glow. The lumo colour is not as strong as the concentrates but can be used for painting, as a colourant for fondant and decorating. Becuase of the unique formulation, the gels will dry when used to paint. It will dry smooth without creating surface cracks. Gel stays suspended, which means you don't have to shake them before use Colours don't fade, even if left in direct sunlight. No after taste. Contains no sugar, glycerine.