DPI Explained

DPI and PPI Explained

DPI (RESOLUTION OF IMAGES)
PPI or Pixels per inch is also commonly referred to as DPI or Dots per inch. DPI dots per inch refer to the resolution (amount of ink drops) on a digital print press. PPI Pixels per inch is the resolution of a digitally created image i.e. the amount of pixels per square inch of area.

RESOLUTION SETTINGS FOR LARGE FORMAT GRAPHICS

  • Small / medium sized graphics 100-125 PPI (DPI)
  • Large sized graphics 50-100PPI (DPI)

There is a stigma attached to printed graphics that dpi should be 300 PPI (DPI). 300 PPI (DPI) resolution is generally used on small paper printed products i.e. business cards or leaflets. These items are printed at 300 PPI (DPI) because of the small size and the close viewing distance. On larger banners and graphics PPI (DPI) can be reduced significantly. Ideally resolution on small to medium graphics should be around 100-125 PPI (DPI), whilst on larger graphics (say 10m x 1m) a resolution of 80 PPI (DPI) (80 PPI (DPI) will be more than adequate.

DPI settings on artworks set to a specific scale
If you are setting an artwork for example 1:10 scale (10%) then you images will need to be a higher resolution in a pro rata scale, so x10 times higher. Ie: if you have a graphics which is set to 1m x 100mm but the output size you require is 10m x 1m your dpi will increase x10 times. So 80 PPI (DPI) will need to be increased to 800dpi and so on.