Sodium carbonate is also used in a photographic process known as reticulation. A film negative can be placed in a hot bath of sodium carbonate which may cause the metallic silver to clump and the emulsion to separate from the base of the film, producing a cracked and abstracted image.
Sodium carbonate is also used by the brick industry as a wetting agent to reduce the ammount of water needed to extrude the clay.
PICTURE IS ILLUSTRATION ONLY