Recently I added some Venice Turpentine into my standard oil paint medium. The effect was unmistakable. Brush strokes where getting smooth, the paint surface became a sort of mat silky, colours where blending better and after drying appeared as a sort of pearl shell.
Actually it was a long way of “try & error”. During 1 ½ year I tries out several supports (wood, canvas), several grounds (Gesso, glue based, coating) and several medium recipe’s. I wasn’t to happy with my “lean-to-fat’ medium series. Basically I mix Portuguese Gum Turpentine + Rectified Bleached Linseed Oil + Stand oil + Dammar Varnish. The leanest has a ratio of 10-2-0-0, the fattest a ratio of 6-0-2-2. During a painting day the oil paint slowly dried out and became that sticky that it was not maneuverable anymore. Finally I found some answers in Max Doerner’s The Materials of the Artist and Their use in Painting (first edition 1977). Now I add just a tiny bit of Venetian Turpentine into the fattest medium. What are your experiences?