Rich Black: a good mix is 45 Cyan, 35 Magenta, 20 Yellow, 100 Black.

For better printing, use rich black instead of single-color black for any design element whose area exceeds 1/8th inch horizontal, 1/8th inch vertical. Also use rich black instead of single-color black for font sizes larger than 16 points.
THE PROCESS

Though you can enjoy any level of involvement you wish, for most clients, working with VMS is a three-step process:

What you do:
1 – Review goals and best design practices with VMS
2 – Send files to VMS
3 – Receive final product from VMS

What we do:
1 – Review goals and best design practices with client
2 – Receive files from client
3 – Gather quotes from appropriate printer(s)
4 – Address trouble spots early
5 – Manage all aspects of the production process
6 – Take care of any press issues that arise
7 – Sequence with multiple presses for the best value
8 – Arrange and conduct press checks
9 – Perform in-depth quality assurance checks
10 – Deliver final product to client