the degree of drying oils envy primarily from the oil (svyazueschego), the second of the pigment (some are sikativami pigment such as umber of promptness with lead whiting) ability to make some things I popadlis 20 30godov where they were pasty smear melkodispestnymi lands (such as volkonskoita) since oil was soft after 80 years! and vice versa, I saw the paste-like paintings that crackled through the 15 years after writing .... the most reliable way to determine the time of job now is isotopic analysis!
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