Theme 3 Effect of the thickness of paint layers on emissiograms, in other words, relation between the thickness of paint layers and the emission intensity of secondary electrons was studied. The selection of X-ray's energy are carried out in accordance with conditions of objects. The X-rays record on the film the various densities of materials through which they pass. All the inner information of the objects are recorded on the film sheet. In the case of painting, the various pigments and other components used create the image of the radiograph.
Different materials have different densities.
In the area of a composition where Silver White is painted, the material so dense that the X-rays can hardly pass through to the film. In other words, the material absorbs almost all the X-rays. The result is a white area on the image. On the other hand, in the area of a composition where Lamp Black is painted, the material so sparse that the X-rays can pass through to the film. The result is a black area on the image.