![]() It could be possible to reach a certain color along different paths and pigment mixtures. A database maintains the characteristics of each original pigment and its specific curve, so a program can match and select the right ones for the color curve to be the same under all three illuminants. We must find out the pigments and their combination to get a color curve which matches the curve generated by the original sample. That color curve would be of a determined color, with a determined illuminant and composed of several pigments. Various factors can alter the perception of color, so a spectrophotometer is used to apply the light (daylight, incandescent and fluorescent) in the same way every time to collect a consistent, objective color curve. The perception of the color depends on the type of illuminant or light that affects the object, and the human eye that observes the object. The technique used to discover the originally used pigments is based on the color curve in the visible spectrum band. ![]() The composition of the color can be find out using current technology with a + -1% error, depending on the pigments used, the specific colors and the state of conservation. These match the original color chips, sometimes differing just a little due to the variety of paint components used. Usually these pieces have suffered from weather and exposure, but some fairly protected parts show clearly how these colors looked when new. ![]() For the study of preserved equipment to get the best idea of the original colors we trusted in recognized and independent laboratories. ![]()
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