on 14/01/03 14:40, Michael Harvey wrote : > This sounds a little confused. I can't imaging anyone wanting to print their > portfolio from photoshop through a rip. There would be no advantage to doing > this as photoshop is a pixel based application and a rip is specifically > designed for dealing with vector / text information. Some printers inkjet and even some photo-imaging rgb devices require rips to format the data into bitmap streams. Most rips have a linearisation tool to get the most out of the printable range of the media. Some rip's such as ImagePrint offer a rgb and CMYK version. The rgb version extracts better prints than the Epson driver can due to the pre-linearisation. > A rip is primarily designed to interpret this vector / text info and deal > with aspects of cmyk colour separation on the way to offset litho. Often > rips will deal with aspects of colour fidelity at the expense of print > quality. Designers tend to be more interested in looking at how the artwork > is going to look on press rather than achieving that 'photo-quality' look > that photographers want. Sort of. See above. The data can be in many source spaces and formats that the interpreter rasterizes to bitmap. It doesn't have to be in CMYK. The profiled and linearised state of a large gamut inkjet will very much exceed the gamut of CMYK press. For example my HP 10PS running on BestColorProof prints out a beautiful portfolio prints with the gamut unrestricted when not using the reference press profile. The newer printers offer the best of both worlds with a good rip, presentation prints, and proofing. This is not to say that for photo printing that a rip is required. The opposite rather. Yet good rips do offer more tools for those who need some or all of the features that go a bit further. In any case both rgb and rip's with custom drivers still have to come up with some better methods to fix our inkjet concerns. Time will tell. -- Neil Snape http://mapage.noos.fr/nsnape
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