Holbein - Ventian Turpentine - 55ml - A heavy, thick and resinous liquid made from European pine trees and used in oil mediums, varnishes and resins. As a medium, it offers transparency and a glossy surface to oil painting. Because it has a characteristic of yellowing with time, it should be used in combination with dry oils like stand oil or volatile oils like turpentine. Available in 55ml bottles.