For flat, simple, spot color seps,
we use VECTOR ART:
CDR (Corel Draw version X3 or lower)
AI (Adobe Illustrator version CS2 or lower)
EPS
PDF
For photographic, 4 color process art,
we use RASTER ART:
(must be 400dpi to size)
TIFF
BMP
PSD (please do not flatten layers)