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Сообщение от Amateur
old picture can be lacquered later production, which contains mentioned isotopes. It happens that pozhuzhshie painting smeared with linseed oil. Oil or varnish, is not yet hardened, can penetrate into the pores of the paint layer and distort the isotopic composition of this layer and, consequently, the results of the analysis. So this method of examination is not reliable at 100%.
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Do you think someone is left linseed oil to 45 of release, to make frank fabrications? By this method of analysis of age should be treated only as one of the complex technological expertise to determine the age. And he answered only one question: "is present in a colorful layer of linseed oil before or after 1945.?" If the isotope is not, then the answer is obvious. And if there are, further examination must technically justify their existence. They invented a new method and the experts should take him to the arms during the technological expertise.