The use of this Medium No. 1 saves time as no prior mixing is required. It can be used to obtain even watercolour effects. Two thin coats of oil paint will give a better coverage than one thick layer and will provide a better surface for future work. A very important advantage of using Medium No. 1 is that it dries over night. The drying rate can be increased by adding 5 ml of Light Drying Oil per 100 ml of medium. More than the recommended amount could effect the quality and permanency of the paint.Another recommended use of Medium No. 1 is as a 'sealer' or cushion over acrylic primed canvas. Simply coat the acrylic gesso with the medium prior to use and allow it to dry, or work on it wet.Summary of Artists' Oil Painting Medium No. 1: Is a permanent artists' painting medium. Is easy to apply. Simply place a small amount in a container and dip in your brush when required. Is rapid drying. It can dry (harden) overnight. Is cost saving. It is cheaper than paint. Allows colour brilliance. Using this medium allows white ground to glow through.Artists' Oil Painting Medium No. 1 can also be used for: Sealing acrylic grounds. When applied direct to the acrylic ground it acts as a mild sealer and helps to prevent the 'deadening' effect of over absorption of the oil vehicle. Preparing a coloured ground. Simply add a small amount of oil paint to the medium. Underpainting. Can quickly lay down an under painting by rubbing with a soft cloth or one of the larger sized brushes. This product is marked as a dangerous/hazardous item. Due to this fact, extra freight charges will be calculated upon check out.