Schmincke Medium W makes oil colours watermixable, enabling them to be used with water rather than solvents such as turpentine or white spirit. For best results Medium W should be mixed in one part to two parts oil colour using a palette knife. Water can then be mixed with the colour to thin the paint down colour prior to use. Brushes and tools that have been used with Medium W can also be cleaned up easily with soap and water. Available in 60ml jars. UK shipping by road only. Not available for International or Northern Ireland delivery.