Coating on Photographic Plate

Photographic plates are the foundation of traditional photography. A photographic plate is a flat, thin sheet of glass or plastic coated with a light-sensitive emulsion. When exposed to light, the emulsion reacts chemically, creating an image on the plate. Among the components of the emulsion, silver bromide is used as a light-sensitive agent.

Silver Bromide

Silver bromide is a chemical compound of silver and bromine. It is a light-sensitive salt that is used in photography as an important component of photographic emulsions. When exposed to light, silver bromide undergoes a chemical reaction that produces small clusters of silver atoms. These clusters then form the visible image on the photographic plate.

Other Light-Sensitive Agents

While silver bromide is the most commonly used light-sensitive agent in photographic plates, other compounds can also be used. These include silver chloride, silver iodide, and other silver halides. Each of these compounds has its unique properties, making them suitable for different photographic situations.

Conclusion

In conclusion, silver bromide is coated on the photographic plate as a light-sensitive agent. When exposed to light, it undergoes a chemical reaction that creates an image on the plate. While other light-sensitive agents can also be used, silver bromide is the most commonly used compound in photographic emulsions.