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Total ink density for offset printing should not exceed 300%, with only one color a solid. Low-quality papers plug up and get muddy with high ink density. You will need to use a high-quality coated paper or a smooth vellum if your design consists of bleeds, full paper coverage and fine detail. These papers are expensive, but you won't get a good result with anything else. Avoid heartbreak and finger-pointing at the printer by remembering this when you commit yourself and a client to a design.