Outstanding color strength, vibrant colors and excellent brushing properties make these paints desirable for any watercolourist. They span the color spectrum from the traditional and historical to natural earth and quinacridones. Superb lightfastness and granulation (in some pigments), procured from all over the world, and manufactured in Seattle, Washington. Primatek Colours: Bring the quiet earth tones of Minnesota Pipestone and rich jewel colours of Lapis Lazuli to your palette. PrimaTek watercolors retain the natural qualities of their source minerals and have a natural luminosity and granulation - perfect for landscape painting. Luminescent, Interference, Duochrome, Iridescent & Pearlescent Colours: These luminescent watercolors made from the mica pigment show best as glazes over darker colours or mixed with other colours, adding their luminescent glow. Duochrome colours contain one pigment that shifts between two colours. Interference pigments scatter light and display a subtle sheen. Iridescents reflect light and their semi-transparent quality adds a fascinating depth to artwork. Pearlescents add opalescence to the color it's mixed or glazed with.