Photochemical etching artist

Does the idea of using photographic equipment and chemicals as art appeal to you Then you might want to investigate a career in photochemical etching. 

Photochemical etching was first used to produce precise machine parts, such as microchips and other electronic devices. Now artists use it to create metal art. In this process, ultraviolet light is used to transfer a pattern onto a piece of metal. Then chemicals are applied to remove certain areas in the pattern, creating an intricate design on the metal. 

The difference in oxidation number gives compounds different chemical and physical properties. 

QThe oxidation number of copper in copper(l) oxide (orange color) is +1, whereas the oxidation number of copper in copper(ll) oxide (black color) is +2. 

The sum of the oxidation numbers of the atoms in a polyatomic ion is equal to the charge on the ion. The following examples illustrate. 

---