
1) Photographic chemical
Found on
https://www.crosswordclues.com/clue/silver-halide

A silver halide (or silver salt) is one of the compounds formed between silver and one of the halogens — silver bromide (AgBr), chloride (AgCl), iodide (AgI), and three forms of silver fluorides. As a group, they are often referred to as the silver halides, and are often given the pseudo-chemical notation AgX. Although most silver halides involv...
Found on
http://en.wikipedia.org/wiki/Silver_halide

(from the article `crystal`) ...and copper ions have one valence electron outside their closed shells. The outermost filled shell is a -state and affects the bonding. Eight ... in photography, the invisible configuration of silver halide crystals on a piece of film after exposure to image-bearing focussed light; it is ... The film b...
Found on
http://www.britannica.com/eb/a-z/s/96

A chemical compound of silver (usually silver bromide, silver chloride and silver iodide) used as the light-sensitive constituent (emulsion) in films. The invisible image produced when the halides are exposed to light is converted to metallic silver when the film is subsequently developed
Found on
http://www.encyclo.co.uk/local/21048

A chemical compound of silver (usually silver bromide, silver chloride and silver iodide) used as the light-sensitive constituent (emulsion) in films. The invisible image produced when the halides are exposed to light is converted to metallic silver when the film is subsequently developed.
Found on
http://www.rodsmith.org.uk/photographic%20glossary/rods%20photographic%20gl

Light sensitive component of photographics emulsion. Compound made up of silver and either chlorine,bromine or occasionally iodine (halogens). Silver bromide being the most common.
Found on
http://www.silverlight.co.uk/resources/glossarynz.html

Chemical compound of silver with a halogen. Silver bromide is the principal light sensitive constituent of modern photographic emulsions. (see Emulsion)
Found on
https://www.encyclo.co.uk/local/20176
No exact match found.