When you prepare a job for printing, first of all, make sure it is the proper size. Browse through our product’s selector to find out what’s the right size for your job. If you’re using images make sure they’re at 300dpi resolution (600 dpi for lineart). Images with resolution lower than this will print jaggy, even though they looked OK on your screen. Most of the applications used by designers will let you ‘overprint’ any object inside artwork. By default, each object ‘knocks out’ background below, but when set to overprint it prints on top. While with blacks you won’t notice any difference, anything lighter will blend with background, producing unexpected results. Please refer to your software manual for details. Always check an overprint preview of your artwork before sending it.