DIY Digitisation   Colour Space   Colour Management   Image Size / Resolution  

Use the Glossary if there are terms you don't understand


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The least understood aspect of digital imaging is that of image size and image resolution. We could devote several pages to the subject, but we won't.

Let's start by getting the jargon right:

  • DPI: dots per inch
  • PPI: pixels per inch

Only Printers use Dots, everything else - monitors, cameras, scanners and image files - uses Pixels. A typical printer will need at least four Dots to reproduce one Pixel.

Therefore, although our Giclee printer's maximum resolution is 2880 DPI, your image need be no more than 360 PPI (click the images to find out more) unless it is incredibly finely detailed, in which case you should contact us for guidance.

In practice, 240 PPI at the desired print size is fine for 99% of the work we do. At a push, we can get by with 180 PPI, but lower resolutions than this won't produce very good results.

If your image is not at least 180 PPI at the desired print size, increasing the PPI to the required amount in (for example) Photoshop will not make the image any more suitable. Leave the interpolation to us: we have tools and techniques that will get the best from your image.