On Nov 11, 2008, at 11:32:00 PM, "David Miller" wrote:
It's just printing that image with the colors that you see, just like any other RGB image you might want to print; it's not doing anything special or unusual with the cartridges or the driver. There's no difference between doing this and opening up a duplicate of that image in Photoshop and printing it from there. If you print this image with color management turned off in the driver (just as you'd be setting up the driver underneath if you were going to be printing a target), then you'll get as much ink as the driver will give you for those "pure" RGB primary colors, based on your paper type, output quality/resolution/speed settings.
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For channel specific control of the light ink components (which the R1800 doesn't actually have) or other primary colors (which the R1800 does have) you would need to drive the printer from a RIP. QTR (QuadTone RIP) is often used to print swatches from each cartridge for this type of testing. Even though QTR is designed for B&W printing, it offers the type of channel control needed for such testing, in its calibration function.
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C. David TobieWW Product Technology Manager
Digital Imaging & Home Theater
Datacolor
CDTobie@...
www.datacolor.com/spyder3