xerografija

Xerografija, also known as photocopying, is a method of copying documents and other visual images using a process called electrophotography. The term "xerografija" is derived from the Greek words "xeros," meaning dry, and "graphein," meaning to write. This name reflects the dry powder used in the process.

The xerographic process involves several steps. First, a photoconductive drum is uniformly charged using a corona wire. The drum is then exposed to light, which discharges the areas corresponding to the image on the original document. A toner, which is a fine powder, is then applied to the drum, adhering only to the discharged areas. The toner is transferred to a sheet of paper, which is then heated to fuse the toner to the paper, creating a permanent copy.

Xerografija was invented by Chester Carlson in 1938, but it was not commercially viable until the 1950s when it was developed into a practical copying process by Haloid Company. Today, xerographic technology is widely used in offices, schools, and homes for making copies of documents, photographs, and other materials. It is known for its high-quality output, speed, and reliability.