When you use black in your document you might think there is nothing darker than
100% black.
But when you print on a litho press or even using digital printers, these blacks may end up looking a bit more charcoal than jet. This is when ‘rich black’ comes into play. Adding some colour in with your black mix can bring some much needed intensity to your blacks and can also help them print more consistently over larger areas. We recommend adding 40% to each of the colour channels to really help your blacks shine.
Nice info. Is it the same for other colours?
Doesn’t really work the same for colours Jim, as they tend to ‘muddy’ a little if you mix them up. However you can make a richer grey by adding equal amounts of colour to black tints- For example a nice rich light grey could be c10, m10, y10, k25.