Please contact us to discuss your artwork specifications if supplying artwork.
As a guide generally all artwork should be supplied as follows:
All fonts outlined
Ensure raster elements (i.e. images) are of sufficient high resolution to output at actual size
Embed images within artwork (do not link images)
Flatten artwork if using complex layers
Apply crop marks to the overall size not the visual size of the artwork with 10mm bleed all sides
Output artwork as a PressReady PDF file or high resolution jpeg