Non-polluting thinner 2 jars of 250 ml, mix the substance with your paste in order to thin the material and facilitate your sketch at the start of the work. Unlike conventional mediums, 'Green for Oil' is a range of mediums and thinner for oil painting that does not contain mineral spirits or turpentine which may bother some users. These discomforts can lead to irritations and allergies. They have been replaced by mixtures of fatty acids and esters of vegetable origin. The resins and oils used in the “Green For Oil” range are the same as for the standard additives (ketone resin for the medium, safflower oil for the gel medium). It is the solvents used to implement them that are non-toxic and which make the range non-toxic. Smell: The smell is pleasant a little oily. The mixture is pleasant to do, but be careful, you must use very little thinner otherwise you will have a drying time that is much too long.