In the world of printing in China understanding key prepress and color concepts is essential for achieving high-quality, accurate results. Even small mistakes can lead to color shifts, misaligned text, or blurry graphics. Here’s a breakdown of four important printing terms you should know: 1. Knockout When blue text is printed on a yellow background, the yellow area beneath must be knocked out — left blank on the yellow plate. This ensures the blue ink prints directly on white paper, preserving its true color. If the yellow is not knocked out, the blue may mix with yellow and appear greenish, which is a common issue in book printing and other full-color projects. 2. Overprint When black text appears on a red background, you should not knock out the red beneath. Black ink effectively covers other colors, and overprinting prevents white edges or halos that may appear due to slight misalignment during printing. 3. Rich Black (Four-Color Black) Always check ...