1) Reduces the consistancy of oil colour
2) Increases transparency
3) Improves the flow
4) On its own, it gives colours a high gloss
5) Added to colours it results in a glaze effect
6) Mixed 50/50 with turps or low odour thinners, it provides a good, general purpose paint medium for oil painting
7) Slows down the drying time. This quality mades it ideal for underpainting and for the initial layers in painting.