It is slower drying than Art Spectrum Medium No.1 as it contains more oil, and is used as the nest fastest medium in the sequence of painting 'fat over lean'. It should be mixed with the oil paint as the layers of painting develop in the fat over lean sequence.
If desired Art Spectrum Medium No.1 may be gradully fattend by adding increasing amounts of Medium No.2 has some of the properties of a glazing medium, but it is preferable to use Art SPectrum Liquol if very thin vells of colour are desired.
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