Ignite Colorants can be added to any Smooth-On liquid urethane rubbers, urethane plastics, and urethane foams (rigid and flexible). The fluorescent or "glow" effect is maximized under ultra-violet light or "black light." Add by Volume (Measured In Drops): Add 30 drops of Ignite¨ per 3 oz (88 ml) of mixed material. If using a translucent material (like Smooth-Cast 325) you can use 15 drops to maintain translucency of the material. Add by Weight (Gram Scale Required): Add colorant at a ratio of between 0.5% - 1.5% of the total weight (Parts A+B mixed) of the material being cast. 1% pigment yields the best results. More than 1.5% by weight offers no benefit and is a waste of the colorant. Too much colorant may cause cure inhibition. Colorants have a limited shelf life and should be used as soon as possible. Close lid tightly after each use.CASTINGS "GLOW" UNDER UV LIGHT. Properties Sampler Pack of 9 Colors contains the following : Red Yellow Pink Green Blue Orange White Magenta Purple DIRECTIONS: Colorants must be thoroughly pre-mixed in the container before using. After dispensing the required amount of material Parts A and B into measuring containers, add colorant to Part B and mix thoroughly. Combine Parts A and B into a mixing container and mix as directed by the product technical bulletin. BLENDING:Combine different colors on a palette to create a custom color before adding to material as directed above.Documentation Technical Bulletin