2025-05-17
Black - and - White Laser Printers
Black - and - white laser printers have long been a staple in offices, schools, and homes due to their efficiency, reliability, and cost - effectiveness in producing monochrome prints. These printers operate on the principle of electrophotography. The process begins with a photosensitive drum, which is uniformly charged. The printer's controller then uses a laser beam to discharge specific areas of the drum based on the image data from the computer. These discharged areas form an electrostatic "image" of the document to be printed. Next, toner, a fine powder made of plastic and pigment particles, is applied to the drum. The toner adheres to the charged areas of the drum, effectively transferring the image onto it. The drum then rotates and transfers the toner image onto the paper. Finally, the paper passes through heated rollers, known as the fuser unit, which melts the toner particles and permanently bonds them to the paper, creating a sharp, high - quality black - and - white p
