Daler-Rowney-Shimmering-Colours-Interference-Medium-Daler-Rowney-D128075712-P-Daler-Rowney-Shimmering-Colours-Copper-produces-a-beautiful-shimmering-effect-reflecting-ambient-light-and-changing-with-the-angle-that-it-is-viewed-from-It-is-especially-effective-when-applied-to-a-black-or-dark-background-P-P-Daler-Rowney-Shimmering-Colours-Interference-Mediums-can-be-used-straight-from-the-tube-and-produce-a-magical-shimmering-metallic-transparent-lustre-with-electric-intensity-P-