This amazing new eco-friendly thinner from Sennelier helps to reduce environmental damage whilst effectively thinning & diluting oil colours, allowing for a more fluid application. A part of their "Green for Oil" range, developed with a key focus on biomass, sanitary & environmental standards to produce safer, non-toxic, greener alternatives to traditional additives. Through an impressive combination of raw, naturally occurring materials & careful science, "Bio-Solvents" provide the same quality & effectiveness we've all come to expect from their predecessors.