main points:
careful with photoshop blacks and converting from rgb, which makes a rich black by default.
-careful with matching a seemingly black image with a plain back box ion a page layout program, sample acolour acurately.
-rich black can cause registration problems if type is small or line art, or reversed.
-a printer recomends low value to be safe: 30c, 30m, 0y, 100k.
-dont use rich black fro body copy, mainly for large blocks of black.
table fro here
Overview of black inks
Name | CMYK | Usage or description |
Standard black | 0C, 0M, 0Y, 100K | Normal black. |
Rich black | 63C, 52M, 51Y 100K | The 'old' adobe photoshop black. |
Cool black | 60C, 0M, 0Y, 100K | Black with a bluish tone. |
Warm black | 0C, 60M, 30C, 100K | Black with a redish tone. |
Registration black | 100C, 100M, 100Y, 100K | Used for registration marks. |
'Designer' black | 70C, 50M, 30Y, 100K | A dark slighly cool black. |
also go to this page for recommended books about print design.
see also:
http://photoshopninja.com/techniques-print/better-cmyk-black-printing/
http://www.typophile.com/node/17683
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