Use this chart to get an idea of the typical LPI needed based on method of printing and type of paper.
Typical LPI and Formulas
|
LPI Chart talk to your printer to find the LPI you should be using for each type of printing project | |
| output / paper | typical LPI |
| screen printing | 35-65 |
| laser printer / photocopier (copier or matte laser paper} |
50-90 |
| laser printer / photocopier (coated paper) |
75-110 |
| quick printer (uncoated or matte bond paper) |
75-110 |
| offset printing (newsprint) |
60-85 |
| offset printing (uncoated paper) |
85-133 |
| offset printing (coated paper} |
120-150 + |
| high quality offset or gravure (such as glossy magazines) |
150-300 |
|
LPI Formulas LPI x 2 is most common, x 1.5 is sufficient in some cases, talk to your printer and experiment to find the best resolution for your needs | |
| formula | example |
| LPI x 2 = SPI | 133 x 2 = 266 required SPI typical project on uncoated paper stock |
| LPI x 1.5 = SPI | 175 x 1.5 = 203 required SPI typical project for a glossy magazine |
| LPI x 2 x % (size) = SPI | 85 x 2 x 150% = 255 required SPI newspaper photo to be enlarged 50% from original |
