(Tagged Image File Format) - TIFF images
are resolution dependent. Resolution refers to the number
of pixels in an image and is usually stated as DPI (dots
per inch) or PPI (pixels per inch). TIFF images are displayed
on your computer screen at screen resolution: 72 or 96 ppi.
However, when printing TIFF images your printer needs much
more image data than a monitor. In order to render a TIFF
image accurately, the typical desktop printer needs 150-300
ppi.
If you are supplying artwork to us,
we recommend that all images have a resolution of 300dpi.