What is toner used for in laser printing?

In laser printing, toner plays a crucial role as the powder medium that is used to create the image on the paper. When printing, the laser printer uses a laser beam to project an image onto a drum inside the printer. This drum is electrically charged, and it attracts the toner particles, which are also charged in a way that allows them to adhere to the drum in the shape of the desired image or text.

Once the toner is transferred onto the paper, it is melted by heat rollers, which bonds the toner particles to the paper, resulting in a permanent print. This process is a key component of laser printing technology, making toner essential for the accurate and effective creation of printed documents. The other options do not correctly describe the function of toner; they refer to processes that do not apply to toner in the context of laser printing.