ABSTRACT
We describe some characteristics and applications of three light-sensitive materials. Since the first appearance of the book, in 2001, there have been new uses and improvements of the materials. Photographic plates have been replaced in most of the applications by digital photography, although photographic plates are still used in some places. Here, we describe some of these applications. Regarding photopolymers, new mixtures have appeared and the old ones have suffered improvements; we describe these. Besides, we present some new applications.
