Lines per inch (LPI) is a measure of printing resolution. The term is used in both printing and scanning. The lines per inch measure is the number of lines of ink per inch that a printer can print. The higher the number, the more resolution the printer has, and the crisper the printed image will be.
Lines Per Inch (LPI) is a measure of the fineness of a printing screen or, more accurately, of the number of lines per inch on a printing screen. The higher the LPI, the more lines there are in a given inch, and the finer the screen. A screen with an LPI of 100 will have 100 lines in a one-inch square.
The purpose of using an LPI is to control the amount of ink that is transferred to the paper. A high LPI will result in a finer print with more detail, but less ink coverage. A low LPI will result in a coarser print with less detail, but more ink coverage.
There are two main types of printing screens: engraved screens and photopolymer screens. Engraved screens are made by etching a pattern into a metal plate. Photopolymer screens are made by exposing a light-sensitive material to a pattern of light.
LPI is also used as a measure of scanning resolution. When scanning, LPI measures the number of lines of pixels that the scanner can read per inch. The higher the number, the more resolution the scanner has, and the sharper the scanned image will be.
Lines per inch (LPI) is a measure of printing resolution, in units of lines per inch. In printing, high LPI values are often used to produce images with a lot of detail, such as photographs. When printing books, a lower LPI is often used to save money on printing costs.