Move a slider. See how printer dots build a halftone.
A 0.1 × 0.1 inch print area, magnified to fit your screen.
Keep LPI at 60 and move DPI from 300 to 1200. The screen cells stay the same size, but the printer has more dot positions to make each halftone dot look smoother.
Change each side independently. Both squares show the same 0.1-inch area.
A 0.1 × 0.1 inch print area, magnified to fit your screen.
NEXT CHAPTER
Coming later: upload a picture, compare it with the original, and try two halftone settings side by side.
Planned · uploads are not available yet
DPI means dots per inch. It shows how many tiny dot positions the printer can use in one inch. A higher DPI can make the edges of a halftone dot look smoother.
LPI means lines per inch. It shows how many rows of halftone cells fit in one inch. A higher LPI creates more, smaller cells, so the screen pattern looks finer.
DPI ÷ LPI gives the printer positions along a cell edge. For a simple square cell with an integer ratio, (DPI ÷ LPI)² + 1 gives the theoretical tone levels, including white and solid black.