Oil Paint Drying Times

One of the fundamental principles to keep in mind when painting in oils is the "Fat over lean" approach, that basically means the top layer of paint should dry at a slower rate than the lower layer. This can be achieved by either adding extra oil to paints used in the upper layers, which slows down the process of drying or simply by starting painting from dark to light. Some manufacturers add dryers to the paint preparation to make them dry pretty much at the same rate, however, these chemicals can compromise the quality of the paint in the long term. 

Here is some info about various commonly used pigments and their drying times. Mixing a slow drying pigment with a fast-drying pigment might alter the drying time depending on their proportions. One should always try to start with fast drying and relatively transparent pigments moving on to slow drying and more opaque paints. In the table below I am also giving the pigment number eg: PW1  meaning Pigment white 1

Reading the label at the back of the tube is important as most of this information is given there. The table below is a guideline and there might be some differences between manufacturers as they might be using different pigments under the same colour name and also due to using different oils in the tube. Avoid buying paints that are in safflower oil. Linseed or walnut oil is the best. One also has to remember that oil paints do not dry by evaporation as watercolour and acrylics do. So the thickness of the paint affects the curing, with thick paint taking longer to dry. Ambient temperature might also affect, in hot weather drying happens much faster, however, never attempt to dry your paintings using heat. Do not forget that oil paint dries by reacting with oxygen in air and not by evaporation. If the paint is touch dry it does not mean that it is completely cured. So it is important to apply thin layers of paint at first moving on to thicker and more oily paint as you progress. 

Fast drying   (1 - 2 days)
Lead whites       PW1      Transparent 
Raw and Burnt Umber  PBr6      semi-transparent   (Very fast drying)
Raw and Burnt Sienna  PBr7      semi-transparent
Phthalo Blue    PB15.3    Transparent
Phthalo Green  PG7         Transparent   (Very Fast)
Viridian    PG18  semi-opaque (very fast)
Cobalt Blue  PB28     semi-opaque    (Very fast)

Average drying time (2 - 5 days)
Yellow ochre  PY43 and Yellow oxide (sometimes sold as yellow ochre) PY42    semi transparent
Cerulean Blue  PB35     semi-opaque
Ultramarine blue  PB29   Transparent
Cobalt teal  PG50  Semi-transparent
Quinacridone magenta  PR122   Transparent
Cadmium red light  PR108   Opaque
Ivory black (Bone black) PBk9   Opaque

Slow drying (5 - 7 days)
Alizarin Crimson  PR83   Transparent
Titanium white  PW6    Opaque
Cadmium Yellow  PY35  Opaque to semi-transparent