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Generally, for example, we can’t establish when a vermilion stroke was brushed onto a painting, but we can date most of the materials that the pigments are painted on.For instance, it is possible to date the wood support of a panel as well as canvas.The investigation of organic residues associated with archaeological pottery using modern analytical chemical methods began in the 1970s.It was recognised early on that the analysis of lipids (i.e.
Unfortunately there are no affordable direct methods for dating pigments, except in some cases as we will see later.Later, heating releases the trapped electrons, producing light.Electron trapping Energy absorbed from ionizing radiation frees electrons to move through the crystal lattice, where some are trapped at imperfections.Samples should not be exposed to heat and powdery examples should not be exposed to bright light.
A sample of the earth also needs to be collected so environmental radiation can be tested.
However, producing fakes with this method calls for expertise on the subject, as well as expensive instruments.
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