LPI stands for which of the following?

• A. Pixels per Inch
• B. Lines per Inch
• C. Dots per Inch
• D. Levels per Inch

Answer: (B)

Lines per inch is a measure of screen frequency used in halftone printing. It describes how many lines of tone lines appear in one inch of the printed image. In halftone screening, tones are created by varying dot sizes within each line, so a higher number of lines per inch yields finer detail and smoother gradations. This concept is key in printing because it links to how clearly an image will reproduce on paper and how the screening will interact with ink and paper quality. The other options refer to different domains: pixels per inch belongs to digital image or display resolution, dots per inch describes printer dot density, and levels per inch isn’t a standard printing measurement.