Soviet lithography and printing technology as a whole separate issue, since the production estampnoy paper in the Soviet Union used sulfuric acid and a very reputable artists say that it turns yellow in 50 years even without the influence of light, paint the same tiporafskie ispolzovashiesya in most cases Torzhkovskaya r da offset inks, change color and fade beyond recognition, good copies of the prints make the work of this kind of graphic special way unique!
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