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<x-flowed>The concept is not the issue. What is missing is the data of other inks, or other ink/paper combinations - particularly pigmented inks that are of current interest because they are believed to be more archival. What is shown on the below URL (I presume this is the Chromix data) is for the Epson OEM ink, and I presume that Epson has never changed the formulation of their ink. Apparently Epson far(?) exceeded the gamut limitations of all Adobe's available working spaces, including Adobe RGB 1998. Chromix has posted a "designed" working space entitled Ekta Space PS 5, by J. Holmes for data from these film transparencies. This film yields data that exceed Adobe's available working spaces, but (importantly) data that could be printed using the superior gamut of Epson OEM inks. However, note that this data cannot be seen on "good" monitors. It would be extremely helpful to see - once and all - ink gamut comparisons plotted against the backdrop of both monitor space and working space. It can be done with the right equipment - perhaps Chromix - provide the missing pigmented ink information. Chromix - per Steve Upton - use a GretagMacbeth's Spectrolino / SpectroScan combination. The 'Lino is a spectrophotometer that measures (in this case) reflected light in 36 different bands from 380 nm to 730 nm- per message to me. I don't know yet what other forms of digital input exceed both Adobe's best (RGB 1998) working spaces and the best monitor capabilities, but it might be that from good digital cameras. (Where's the data?) In any event, I don't know why this data should be restricted and left off (or worse deleted) by using a "restricting" working space. The most restricting being sRGB. We can see this color gamut. Why not print it? In the rush to better archivalness, let's not forget image fidelity - as seen by the human eye. If we place archivalness of 50 years on the balance scale against true image color fidelity and brilliance, IMO the latter will be more important, and only a small tradeoff will be tolerated. > > >> In a message dated 2/19/00 1:54:17 PM, dickmoyer@earthlink.net writes: >> >>>I have yet to hear/read >>>a concise explanation of ink gamut latitude or limitations with >>>respect to each other, or to monitor display limitations. >> >> Envision the CMYK printing space as a rough circle: Jon wnats to >>plant an RGB >> triange on its that fits entirely inside it. I want to plant a triange over >> it that entirely encloses the circle. The areas that the inks of a n Epson >> excveed ColorMatch RGB are basicly in the high percentage Cyans, a bit less >> in the dark yellows, (the combination of these resulting in some lost greens >> as well) and a bit in the dark magentas. >> >> C. David Tobie > > >Here is a link that visually explains these concepts which have been on our >web for some months now. > >http://216.71.143.81/store/techsupport/ts-rgbsetup-mac.html > > >-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- > >Jon Cone >jon@cone-editions.com >http://www.inkjetmall.com >http://www.cone-editions.com/workshops > >-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- > > > > > > > > > > > > > > >. >- >Please turn off HTML mail features. Keep quoted material short. Use >accurate subject lines. http://www.leben.com/lists for instructions. - Please turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for instructions. </x-flowed>
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