Tri-Art Water Colour Tube, 22ml, Transparent Permanent Orange Finely milled pigments, fully encased in a pure, Gum Acacia base. Modern colour palette includes a range of mica-based iridescent and interference colours for shimmering overlays and pearlescent effects. Packaged in modern and highly efficient 22mL tubes  perfect for larger volumes of colours to be prepped for large scale paintings.