Daler Rowney FW Ink Primary Colour Set

Acrylic inks are made using a pigment and a binder much like oils, acrylics and watercolours. Sometimes the binder and pigment may separate in the bottle and will need shaking to mix them again so that they are ready for use. This is more common in colours such as white and yellow, so you may find that these colours need more shaking than darker colours. The degree of separation varies from one range to another, and should not be considered a fault.