Daler - Rowney FW 29.5ml Ink Bottle - Pearlescent Effect (Set of 6) A range of 22 water based, pigmented acrylic colours producing a shimmering pearl effect. They are water soluble when wet but dry to a water resistant film. All colours are extremely lightfast. They can be applied to wood and leather as well as to paper and board. Pearlescent inks can be applied with brush, dip pen and ruling pen.