We could perhaps do this - what size do they have to be saved and is there a particular format that is best (if anybody knows) We would love to be in the free bumper sticker business!
>> Speaking of which, are there any sites that have
>> downloadable bumper sticker art?
> ... what size do they have to be saved and is there
> a particular format that is best
The common full-sheet label stock is 8.5x11, but on many
color inkjet printers, the useable region is only 8x10.
Plus, people probably want to avoid wasting half the
sheet.
So I'd lean toward 4x10 in size. Composite two of the
same sticker images in one 8x10 image. People who want
to print a sheet with two different sticker images can
recomposite them using their own image editor.
The file format depends on the content. For any raster
images, 150 dpi is probably more than adequate. If the
file ends up too large at 150, 75 will do, consider the
normal viewing distance.
If the art is originally vector (.EPS, .AI, .SVG), then
Acrobat (.PDF) is the most efficient. But also make the
image available in .GIF or .JPG.
If the art is originally raster, and contains simple
flat-field colors, use .GIF. If it contains contone
imagery (e.g. photos), use .JPG.