ofsetrullikule

Offset roller refers to a type of printing roller used in offset lithography. These rollers are critical components in the transfer of ink from the printing plate to the paper or substrate. The offset printing process involves a series of rollers, each with a specific function. The offset roller, often called the "blanket cylinder" or "offset cylinder," is typically covered with a rubber or synthetic material. This surface is designed to receive the ink image from the printing plate and then transfer it to the paper. The flexibility of the rubber allows it to conform to the paper's surface, ensuring a sharp and even ink transfer.

There are usually multiple offset rollers in a printing press, working in conjunction with other rollers like ink rollers, dampening rollers, and impression cylinders. The offset roller itself is part of the mechanism that "offsets" the image, meaning it doesn't print directly from the plate but rather transfers the image to an intermediate roller first, which then prints onto the substrate. This indirect printing method is the defining characteristic of offset lithography and contributes to its widespread use due to its ability to produce high-quality images with fine detail and consistent color. The condition and precise calibration of the offset roller are paramount for achieving optimal print results.