Try Artisan Water Mixable Linseed Oil to improve the flow of colours. This slow drying oil reduces the consistency and improves the flow of Artisan Water Mixable Oil Colours. It also increases gloss and transparency. Artisan Water Mixable Thinner is an odourless paint thinner that has been specially developed to maintain the oily feel of Artisan Water Mixable Oil Colour. As Athis thinner does not form an emulsion with the colour, there is less colour change than there would be with water. Artisan Water Mixable Fast Drying Medium is excellent for glazing and fine details. This medium smooths brushwork and increases the transparency of Artisan Colour. It is excellent for glazing and producing fine detail. Use with Artisan Thinner when painting in layers to maintain the ‘fat over lean’ rule. Water-Mixable Oils: Everything you need to know!