QTR-Quadtone RIP

Sorry I replied in a hurry and it came out quite cryptic. What I wanted to say is that looking directly into the quad file (and eventually editing it) can be useful in some cases and it can be done. In my case I printed a digital negative of a grey 100-step chart and to avoid a lenghty process of repeated guessing of what should have been the minimal density able to produce paper white in the final print, I put the quad values in an excel spreadsheet. Just as an example, if you know that your 75th step is already white, what you do not know (if not by a gross aprroximation given by the curve view tool) is the exact mix of inks put down by the printer at that specific point of the curve. That is where looking in the .quad file is very handy. Each color has 256 levels and fpr each level a number ranging from 0 to 65535 tells you how much of that specific ink is layed down by the printer. Just dividebthat number by 65535 and you have the % for each ink. In my case, those numbers became the new ink limits in the refined curve to get the smoothest possible gradient .
Hope that helps

simone personal website:
www.lookinglass.it

> Il giorno 29 mar 2016, alle ore 16:41, sw3457@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> ha scritto:
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> Hi -- Anyone know how to edit a .quad text file on a Mac to make changes to the curve?  I get the workflow for a .qidf but the .quad is confusing and I can't find any documentation for adjusting it (even though the text file will open).    Thanks in advance!  Scott
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