Shimmering Colours (Interference Mediums)
Available in six colours: Shimmering Gold, Copper, Violet, Red, Blue and Green. Used straight from the tube and applied to a black surface they produce a magical shimmering, metallic, transparent lustre. The most dramatic effects are on black, where colour shows with electric intensity.
 
Detail product specification, please visit Daler-Rowney Website :
http://www.daler-rowney.com/en/content/acrylic-mediums