Derivan Block Ink Medium and Extender is a versatile medium which can be used in two unique ways to create fantastic relief prints.

As an extender - add to Derivan Block Ink colours to extend and make your colours more transparent without loosing the body of the paint as would it happen when adding just water. As a medium - add Matisse Structure Acrylic paint colours to Block Ink Medium and Extender to create your unique block ink colours.