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stochastic-printing-process-conventional-red-overprint

Stochastic Printing Process Renders Larger CMYK Gamut

Conventional halftones, often referred to as AM screens (amplitude modulated), distribute ink over a grid of dots that increase in size for darker tones. Throughout the tone scale, the frequency of dots remains the same, but the size or amplitude increases. The ink and water requirements vary greatly throughout the tonal range, causing a basic lithographic instability for which there are no on press controls. (more…)

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halftone-dpi

What’s the DPI?

If a POD printer asks you to submit 300dpi grayscale images from which they can make halftones, it does not mean that output is going to be 300dpi, or that the 256 shades of gray you see in each pixel of your computer screen are going to show up in the output. In fact, there are no shades of gray in the interior of a book; gray is simulated with black dots of different sizes. (more…)

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