All files should be supplied in CMYK: files supplied in RGB will see some color shift and you may not be happy with your print job. We are not responsible for files supplied in RGB.
Resolution: Files should be 300dpi or higher, 300dpi is print quality, files supplied at lower resolution may not be printed. Low resolution files i.e 72dpi will print very badly with lots of pixelation. We are not responsible
for low quality files.
Bleed: all files should be supplied with bleed see this page for details.
Separate files: Each side or page of a print job should be supplied as individual page, i.e postcard_front, postcard_back. Please name your files accordingly to ensure correct printing and the quickest possible turnaround.