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Black magic: Understanding rich black
Black can be created using various combinations of color values. However, sometimes due to the type of ink or printing material, achieving a deep, rich black can be challenging. This is where rich black comes into play.
Rich black involves adding varying amounts of Cyan, Magenta, and Yellow (CMY) to the Black ink. The specific values for these colors can change based on the printing press, materials, and even the design itself. It's essential to note that there isn't a one-size-fits-all formula.
1. The Total Ink Coverage (TIC) value, which we've discussed in previous posts, plays a significant role here. TIC can vary across different color profiles. Therefore, the amount of rich black should be adjusted to match the specific TIC value.
2. Because rich black involves multiple colors, precise color registration on the printing press is crucial. Additionally, the press operator must take steps to prevent set-off—a condition where ink transfers from one printed sheet to the next while still wet.
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