wOil water mixable oil colours have been developed to emulate traditional oil colours. The main difference between wOils and traditional oil colours is wOil's ability to thin and clean up with soap and water rather than solvents that require special care in handling and use. wOils are ideal for oil painters who are sensitive to, or want to avoid solvents such as turpentine, the classroom where the use of traditional oils has been banned because of the solvents involved and Artists who work in an enclosed environment. There is no water in the wOil formulation. The linseed and safflower oils used in the formulation have been modified to allow the colour to mix with water, creating a stable emulsion while still retaining the working characteristics of traditional oils. The breakthrough "Green Chemistry" employed in the production and development of wOil Artist Oil colours means that all colours in the range are AP non-toxic. wOil has a smooth buttery consistency with a medium to heavy body viscosity and can be blended easily with traditional oil colours and mediums or even acrylic based colours. Considered "permanent" for artists' use, all wOil colours have a lightfastness rating of I or II. When wOils are thinned with water the water evaporates from the paint film fairly rapidly, leaving behind a traditional film of oil that dries by means of oxidation. Most wOil colours will dry between 3 - 5 days.