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Do oils have to be used as well as solvents when painting with oil colour?

April 26, 2017colour Oil Oils painting solvents Used

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Do oils have to be used as well as solvents when painting with oil colour?

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If paintings are completed in one layer or ‘alla prima’, using a little solvent (turps) only is fine. If painting in layers then it is necessary to increase the amount of binder in each successive layer. This is called ‘fat over lean’. This is achieved by reducing the amount of solvent and replacing it with oil or binder in each sucessive layer. Fat over lean is a necessary oil painting rule which prevents cracking.