A software should be used to “Refine” PostScript into PDF format, however Adobe’s Acrobat Distiller is acceptable. We require PDFs.
We specify that files should be produced with crop marks on, exactly centred on a page 40mm larger than the final trim size, giving 20mm all round (for A4 this would be 250mm x 337mm). Offset the crop marks by at least 6mm (17 pt) and allow for 3mm bleed. Do not set to print any colour separations or to mirror, negative etc. We will set these at the point of output. Ensure that all images print at their full resolution.