Unlike Traditional Acrylics Interactive Colors Do Not Suddenly Form A Skin. Interactive Changes The Painting Process, Giving You Plenty Of Time To Blend And Rework And Giving You More Creative Freedom. The Patent-Pending Formulation Allows Even Touch-Dry Paint To Be Reworked Or Ragged-Off To Blend Or Reveal Layers. Archival Quality And Lightfast, The Intense Colors Dry To A Satin-Like Finish Without A Plastic Look Or Feel And Minimal Color Shift.