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SEPARATION STUDIO SINGLE SOFTWARE

You don't need to worry about the lineature and angle but only the resolution (ppi/dpi) of your files. All you'll need to do is send your files properly. The color separation itself is done by the printer. If they will print 120LPI set your DPI on the image dimensions to 240 DPI.Ĭonversion from RGB to CMYK is a lossy process so do this conversion on a copy of the file, once converted it will stay in CMYK.

Offset printing uses LPI (Lines Per Inch), find out what LPI they use on the requested paper and set your DPI to double that number as a rough guide.

If that happens you can make the necessary adjustments to bring them into gamut.

If you can obtain from the printer a device profile, you can do soft proofing to make sure nothing important goes out of gamut.

When you convert from RGB to CMYK you can judge the quality of the colors on your calibrated monitor.

If it will be offset printed, you may be better off converting your file to CMYK and letting them prepare the color separation.

First, make sure that it will indeed be printed on an offset printer because there are many printers who will print on digital printers where the input is expected to be RGB.

I don't deal with four color process screen printing very often so I'm reluctant to provide specific instructions but there are lots of resources available online covering CMYK separations within Photoshop. If you're just interested in this at a hobbyist level, you can certainly accomplish this with just Photoshop.

It does have some separation functionality built in, but not enough to prep your design for screen printed four color process.

Illustrator has plugins available to produce vector halftones (Phantasm), but out of the box it's not the right choice. Within the Adobe Creative Suite, Photoshop is the tool you should use to do this.

SEPARATION STUDIO SINGLE SOFTWARE

As others have already mentioned, the print shop you're dealing with will likely do the separations for you (and probably have the powerful software to do so). There are programs specifically designed to do this (AccuRIP, Separation Studio), but they are quite expensive unless you're a print shop then that cost will be difficult to justify.