Winsor newton artisan water mixable linseed oil 250ml thinner 250ml winsor newton 3039723 p this artisan water mixable linseed oil 250ml is the most commonly used medium with artisan oil colours reducing consistency and improving flow while increasing both gloss and transparency p p this linseed oil can also be used to maintain the structure of the paint film when combined with water or thinner and plays a key part when painting in layers to maintain the fat over lean rule each su