This video shows how a casting made with UVO® UV resistant urethane pigment and and equal amount of So-Strong® pigment compare. UVO® will yield an opaque casting, while the So-Strong® will give a semi-transparent effect.

UVO® Colorants are concentrated, phthalate-free urethane color pigments that resist ultra-violet light. By adding a small amount of UVO® to a Smooth-On epoxy, urethane rubber, plastic or foam product, these pigment dispersions will yield opaque castings (vs. SO-Strong color tints that can yield translucent urethane castings). For glowing fluorescent color effects, use Ignite® colorants.

Make It Now! with Smooth-On
http://www.smooth-on.com/
  / smoothon  
  / smoothon  
http://www.google.com/+smoothon

~-~~-~~~-~~-~
Adult Supervision Required
Keep Out Of Reach Of Children
~-~~-~~~-~~-~