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Unfortunately there are no affordable direct methods for dating pigments, except in some cases as we will see later.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 three most important dating techniques which are useful for the analysis of works of art are: Thermoluminescence (TL), Dendrochronology (DC), and Carbon 14 (C15). It dates items between the years 300-10,000 BP (before present).Measuring the intensity of the luminescence can determine how much time has passed since the last time the object was heated.

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The intensity of the thermoluminescence light is proportional to the time that has passed from the last clock resetting event, which for ceramics correspond to when it was baked.Samples should be placed in a polyethylene bag and sealed with electrical tape.To test the date we need to measure the sample’s thermoluminescence light which is then correlated to the accumulated dose of ionizing radiation.The TL operator generally takes samples for dating from the bottom, avoiding damage to the image of the artwork.TL is based on the fact that almost all natural minerals are thermoluminescent.

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