A lighter shade of pale

[Steve Rickaby]

Dear Framers

For a non-color book, FrameMaker offers you several ways of creating half-tones. For example, you can:

. Use the predefined Grays library in the color picker

. Create your own gray from C:0 M:0 Y:0 K:whatever

. Use a percentage black fill on an object, such as a graphic or a table cell

There may be more. My question is, what is the recommended technique that will result is a pre-press PDF that doesn't demand extra plates? 

Or doesn't it matter?
 
-- 
Steve