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Quad Tone RIP
Is anyone using QTR to make digital negatives? If so can or would you spare any details about what you are doing with this RIP (or any other for that matter) ?
Don Bryant
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New Book
http://www.ronreeder.com/articles/digitalnegs.html
Just in time for Xmas. I've not delved into the curve builder yet, but I looks like it must work if someone has written a section of a book devoted to it...I'm going to try building some curves shortly I'll keep you posted.
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Merry Christmas, in deed. This looks interesting.
Don, I picked up QTR because of the ink control options in it. ---That was just before I dropped my PDN calibration work with Azo G3 (first due to lack of Amidol, and then the paper itself, as you know, dissappeared). (I am very pleased with this RIP for printing "inkjet premonitions.") I am getting set up to resume work with PDN on palladium, so I am equally interested to know other's experience with QTR making digital negatives.
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You might also want to look into the Bowhaus RIP IJC/OPM. the GUI is a bit more friendly, which translates to easier use. It is of course more expensive. http://www.bowhaus.com/services/IJCOPMmain.php4
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I started to test some IJC/OPM profiles for making digital negatives directly from positive images (ie 'inverted' profiles) but got distracted when the K3 inks came out.
Last week I discovered by chance that I could print using a mixture of MIS base, Windex and red dye (from a stamp pad refill - I had to dye the cleaning mixture to see the nozzle test patterns) with an Epson 2200 that wouldn't print with OEM ink. Even after getting perfect prints with the dye, the clogged nozzles wouldn't print with OEM ink. This means that I now have a 2200 that can't be relied upon to print normally, but which seems perfectly capable of printing red dye images. I will resume my tests.
Best,
Helen
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 Originally Posted by mkochsch  http://www.ronreeder.com/articles/digitalnegs.html
Just in time for Xmas. I've not delved into the curve builder yet, but I looks like it must work if someone has written a section of a book devoted to it...I'm going to try building some curves shortly I'll keep you posted. Interesting, perhaps Ole Saint Nick will drop me off a copy.
Don Bryant
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Originally Posted by Nathan Jones Merry Christmas, in deed. This looks interesting.
Don, I picked up QTR because of the ink control options in it. Yes I like the ink control options and have wondered how QTR might be able to be used for making digital negatives. However I prefer colorized negatives to black only.
Don Bryant
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Originally Posted by Don Bryant Yes I like the ink control options and have wondered how QTR might be able to be used for making digital negatives. However I prefer colorized negatives to black only.
Don Bryant Don, colorized negatives can be made with QTR too. I've set up a printer with QuadToneRip that can print monochrome C, M, Y, K, CY, CM and mixes of two of these colors. For each color I made a QTR setup C and M are made with C and LC or M and LM. CM is a four color mix. CY a three color mix.
For salted paper and albumen I am using CY as printing color. These prints are green. For printing van dyke and cyanotype I take down the ink load percentage in the driver. Of course each process has it's own correctioncurve, but you can integrate these in the QTR setup for each process/color. For short scale techniques like gum I am using 90% CM with 10%Y (purple negatives).
With a dedicated black and white printer I get excellent results on Agfa CopyJet with QuadToneRip by using only grey inks (no K).
Last edited by kees; 10-30-2006 at 04:36 PM.
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Kees,
I've gone through the process of linearizing curves with QTR but I cannot wrap my brain around how to use color inks excluding black inks from the printing process. But even more importantly how would one decide which inks to use?
Don Bryant
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Originally Posted by Greg_E I'm sure this is a great product but how would one use it for making digital negatives?
Don Bryant
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