Lefranc & Bourgeois Turpentine

Turpentine is obtained by distilling the gum from pine trees
It is then rectified, which makes it colourless and increases its fluiditiy.
It is mainly used for thinning oil colours, therby making them easier to use for the basic sketch by fluidifying them without altering their hue.
Less volatile than Quick drying petroleum, it gives less of a matt
appearence to the work.