I want my text for a Print On Demand (POD) book to be jet black, not be a combination of colors, is that offered?

At least one of the POD printers told me Good Luck when I said that my type in Word was jet black on white on the screen but in an Acrobat reader PDF screen the type was a very dark blue and the edges of the bold type (quotes), again a very dark blue, weren't crisp and sharp. If Adobe's Acrobat PDF black is a combo of colors I can see where that would put the printing cost up.

Harry Coleman