Light that passes through an object.

the placement of a light source behind the painting. With this technique, light is transmitted through cracks, tears, paint losses, and thinly painted areas, thereby differentiating them from more heavily painted areas.

Is produced by placing a light source behind an object-as in a light box-so that the light is passed through the object. The light is useful in detecting damage because it shines more strongly through the areas where the object is torn, split or worn. Insect damage, splits and weaknesses in paper, textiles and paintings can often be identified at early stages by using transmitted light.