Registration Black Background

What it means: A black background is built of 100% of all 4 colors (100% cyan, 100% magenta, 100% yellow, 100% black). Problems caused: This causes too much ink on the sheet which can cause a variety of problems including a duller finish on the black background and white text that chokes out and becomes thinner than intended, in addition to a variety of problems on press, such as drying challenges. How to fix: Change the background to a rich black (60% cyan, 40% magenta, 40% yellow, 100% black) or 100% black.