Maybe I'm a bit late with this but it may be of help
The DPI depends on the screen ruling for the finished job. A rough rule of thumb is to double LPI (lines per inch) to give DPI (dots per inch). So if sreeen ruling is 150 LPI use 300 DPI. I always use 300 DPI as most offset printing now is 133-150 LPI. Sometimes 175 LPI
I work in CYMK in PS as it allows me to adjust channels (these finish up as printing plates) and as I have a Photoengraving background I can 'etch' (Burn or Dodge) differnet areas to achieve better results. You must know color percentages to use this tecnique'.
Setting Color Profile
File-Color Settings-CYMK-Eurostyle Coated v2 (If printing on coated stock, else check with printer as what profile they want)
Color Management
RGB - Preserve Embeded Profiles
CYMK - Convert to Working CYMK
Gray- Off
OK
Image - Mode - Convert to Profile (use Working CYMK, or what ever profile you have assigned)
This will convert your RGB to printable CYMK and keep most of the tonal range. Not all as the color space differs in RGB to CYMK
To eliminate over-saturation on Black plate
goto the Black Channel. Open Info Window F8
Open Adjustments-Levels. Place Curser over blackest part of image and read K value in CYMK in Info window
Adjust the White Point til the Info reads about 50% K
Click okay. Thats it
You will never get a printed image to match your screen as there are too many variables involved.
i.e. Ink manufacturer, type of press, skill of printer, type of printing stock, plate exposure, etc and the list goes on
Hopes this helps. It's a tough area
Ted |
