Impervious to light or not translucent. A pebbled film surface similar to the skin of an orange in appearance. It is caused by too rapid drying before leveling takes place. It not only covers the original paint, but its presence often indicates an excessive alteration of the image. Over painting is not an acceptable conservation technique.
Pentimenti are the changes in composition which a painter makes while producing a painting.
A finely divided, insoluble substance which imparts color to the material to which it is added. These have high dielectric constants. A large molecule formed when many molecules are linked together by polymerization. An organic polymer in the form of a crystalline or amorphous solid, or viscous liquid, of wither natural or synthetic origins. The work done by a restorer to replace areas of loss or damage in a painting.