How do Poppy and Safflower oil differ from traditional Linseed oil as mediums?
Poppy and safflower are classed as semi drying oils, whilst linseed is a drying oil. Semi drying oils are paler than linseed but dry more slowly. Safflower oil is not available as a medium. Poppy oil is supplied as Drying Poppy Oil, which has added driers to it. This provides a pale medium for use with whites and blues but with a comparable drying rate to linseed to help avoid cracking. For further information on Drying Oils click here.