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Regarding the question below on the sharp detail of the Piezogrphy BW driver: There are three issues here. The first is that a 1200 has a much smaller dot than a 3000 so the image detail has a better chance to come through the standard Epson driver. Detail with the 1200 Epson driver is to my eye very close to detail with the Piezography driver on a 3000. Second, the 1200 places more ink in the highlights since it has three built-in light ink channels (light c, light m, and yellow). More light ink in the highlights means the dots in the highlights don't have to be spread too far from the printer's maximum true dot density of 720 dots per inch to get any specified gray tone. Since the dots aren't separated as far they can retain more of the printers theoretical maximum true detail (and I won't speculate what *that* maximum is - but it is relative to how close you can put the dots together). The Piezography driver mimics this virtuously by partitioning the light ink channel into the highlights and the dark ink channels into the darker zones so the Piezography driver retains more of the theoretical max detail in the highlights. You can do exactly the same thing on the 3000 with a RIP and a manual CMYK channel separation but that is a very complex procedure. Finally the third point - the Piezography driver is supposed to actually *increase* the theoretical max dot density and thus the theoretical max detail. I don't know much about the mechanical methods used by the driver so I can't say if this claim is accurate. However I do know that the Piezography driver only makes a single pass as opposed to the Epson drivers four pass printing so there is a possibility that there is a small loss in the Epson driver due to mechanical registration inaccuracies between passes. So there is some possibility that on any one printer type the Piezography driver would have less problem with retaining image detail (and more of a problem with banding) as a result. Again, in my first post, I was comparing a six color small dot printer (the 1200) to a coarse dot larger printer (the 3000) and I find that the smaller dots and light ink channels of the 1200 offset much of the gain one would have using a 3000 with special CMYK/RIP techniques or with the Piezography driver (which essentially incorporates a special CMYK technique to achieve some of its greater detail). I *predict* that at least some of this will hold true when using the 7000 and the 9000 six color printers with multi-tone gray inks and the standard Epson driver. At the very least what should hold true is that the Epson driver with a printer using the light ink channels in any six channel Epson printers for light gray inks will give as smooth a highlight tone as a four channel Epson printer with a special driver or CMYK technique. So it may be true that a 7000, using the standard Epson RGB driver, will give as good a grayscale print as a 3000 with the Piezography driver. But then the 3000 including the Piezography driver costs a heck of a lot less than a 7000 - which is why I have three 3000s and no 7000 :-) Dan Culbertson > > Hi, I supposed that one of the most important features of Piezo was it's > ability for good image detail (shape detail I mean). And this was > achieved by using the specialized driver. But from your comment below it > sounds like a pure ink based system (plus native driver) can challenge > the whole Piezo approach. > > Did I misunderstood something? > > Rodrigo > > > "F. Neil Simms" wrote: >> >> date. But >> it's beginning to sound like John N.'s won't work too well on 4-color >> printers (compared to 6-color ones), so I'm in a state of dither... I >> may ditch the 1160 and buy a 1200/CIS to use with John N.'s inks if that >> combination is shown to produce prints of quality comparable to >> Piezography, and iff they make them available in bulk. - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions.
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