However, if there is a large area of black that overlaps another colour then it may be affected by the underlying colour and look slightly different. Generally, you will want your blacks to overprint, especially black text. These are used as a guide for trimming the printed items to size. When supplying artwork as a PDF ensure that you have selected the option to include crop marks during output. This can be checked in DTP software such as Adobe InDesign by checking the effective PPI (pixels per inch).Ĭheck that your design extends at least 3mm on all sides to allow for trimming once printed.įor more details about incorporating bleed see A quick guide to print bleeds Ideally all colour and greyscale images should have a minimum resolution of 300ppi once they are resized. Either edit these colours in your DTP software or convert them to CMYK during output, as shown above. If your document is to be printed in 4 colour then avoid using any spot colours. The artwork contains unwanted spot colours The recommended profile in the UK is Coated Fogra39.įor more details about converting colours see Should I convert RGB colours to CMYK? If you are supplying artwork as a high-resolution PDF then you can convert images to CMYK when saving the PDF. Some fonts cannot be embedded due to licensing restrictions, ensure that you only use fonts that allow them to be embedded.įor more details about correcting font issues see Avoiding font problems in PDFsĬheck that all of the images in your document are CMYK. This will also apply if you are producing a high-quality PDF, any images or fonts that are missing will prevent the PDF from printing correctly. Make sure that you are supplying all of the images and fonts required for output.
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