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    Don hutcheson's equations and npdc graphs, and color management

    raffelj, That makes my day! The color/math geek in me enjoyed researching and making and using it :) Now I get to know it is helping others understand what's in the G7 documentation when seeing the math behind it. Bruce Lindbloom modified the Murray-Davies formula. It's Obvious Don Hutcheson...
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    Don hutcheson's equations and npdc graphs, and color management

    gordo, I agree with what you said. But it does come down to an ICC profile. Method you choose what you want to do. Europe uses TVI. ISO is a barn door for TVI tolerance. Not specific enough. There were problems in the ICC profile Europe had for conversion. So out-of-gamut mapping is in ICC...
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    Don hutcheson's equations and npdc graphs, and color management

    Also got to say this one other thing Todd. As far as I am concerned, there was never a time when our proofs and press sheets didn't match. Old way = Took fingerprint of how press printed linear film made into plates and put on press, and used that ICC profile in proofing. Problem = Different...
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    Don hutcheson's equations and npdc graphs, and color management

    Todd, I spent hours automating the UP, OVER, DOWN, which are MANUAL steps printed on the graph, along with the 1st step of Lab solids. I didn't reinvent anything. My company would not pay for IDEACurve software, but I was being asked to do the impossible (get there without even a spectro, which...
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    Don hutcheson's equations and npdc graphs, and color management

    maas, The solid ink density you use for house densities is the density you have when getting 7 solids' Lab values within tolerance of GRACoL-supplied target values (C,M,Y,K,CM,MY,CY). Before the process, I correct for paper error based on math given in addendum to get modified solid target Lab...
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    Don hutcheson's equations and npdc graphs, and color management

    J, I give a load of content and all you reply is about caps. How can I come back to such a masterpiece of non-related-to-topic-at-hand work you've put together??? Like I said, stay powerless if you want to. If how I'm saying what I'm saying is more important than what I'm saying, go ahead and...
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    Don hutcheson's equations and npdc graphs, and color management

    gordo, Don Hutcheson nor anyone else is going to help yuou. Sorry. You have to be open-minded. Bruce Lindbloom is a color scientist that midified the Murray-Davies formula and you can use TVI to compare in the Excel documents I provided if you actually looked. The NPDC graphs are density minus...
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    Don hutcheson's equations and npdc graphs, and color management

    You are the people that should be trusted and you don't even know what you are doing. You can't debate because you are clueless on COLOR. Is this NOT printplanet.com? Learn, teach, debate? Yeah, and you "experts" are saying this is faith-based? This is NUMBERS. Nothing more. Sorry I'm over the...
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    Don hutcheson's equations and npdc graphs, and color management

    Well, I use a microwave, drive a car, and use all kinds of things that I don't know how they work. So to USE this, it's OK if you don't understand the underlying math. To know how color works though, you must educate yourself on properties of light - where color comes from, work that was done...
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    Don hutcheson's equations and npdc graphs, and color management

    gordo, How's it going my friend? Long time. This is my understanding, perception and implementation of freely available math in G7 beta original documentation, as well as updates up to end of 2010, and freely available math on the internet at a few different sources that helped me implement...
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    Don hutcheson's equations and npdc graphs, and color management

    Are you saying can't implement this? OK. I found it quite easy myself. Do you have questions? Kind regards, Don BTW, I'm no consultant, just said with my knowledge of color all around, I could be one. 15 years was enough for me in prepress and color. Don't want to be in the industry myself...
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    Don hutcheson's equations and npdc graphs, and color management

    Hello all, My name is Don Isbell, Jr. I have not been in prepress or printing for about a year now (I am now a Forex trader, Don Isbell, Jr. | LinkedIn), but was looking at an Excel document that I made years ago, and converted to Apple Numbers. Background: I've kept up with GRACoL since its...
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    Steve Jobs has died

    I sit here crying, feeling as though I have lost a dear friend. I have used Macs since 1993, and as a Mac fanatic, I wanted to know all about the men who started Apple. Woz, I love you man. It couldn't have happened without you. Unfortunately, engineers like us rarely are good salesmen, so you...
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    How can I get a print profile to send to a customer from Xenith?

    TinaB, The customer obviously has a color managed workflow, and is wanting from you a press profile (one that shows how their job will print on the uncoated paper). They want this profile so that they can soft-proof in PhotoShop to see what the final printed product will look like while they...
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    Edit Image in PDFs

    Yep, just one area of Acrobat "Professional" being held back and treated as a red-headed step-child. Regards, Don
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    Converting colors

    When I need to change a color, I make a new Illustrator document, place (link) my PDF into position on the page, select the PDF and flatten transparency with my custom preset. This gives me the outlined type (so no type changes can be made) and objects I can change the color of. I know this...
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    Poll - Do you linearize your plates?

    gordo, This is where I disagree with you. The person has 2 CTPs, and 3 plate curves. This sounds good/right. Let's say that with linear plates, that when linear plates are put on press and G7 applied, the result for prepress is that we have our (press) plate curve. There is now NO NEED to...
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    Poll - Do you linearize your plates?

    Now, I just voted and said I use an uncalibrated plate with a curve, but I need to explain one thing: I would linearize the plate first and then apply a curve to it, but my plates are already naturally linear within tolerance of 2 (tolerance given by platesetter manufacturer), so no need to...
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    GRACoL 7 - spectro with UV at end of name

    just used our house paper for both. Both had too high b* to be considered within tolerance. Looks good to me. I'm done with it. As long as we match the proofs, and satisfy the customer, nothing else really matters. To me, G7 doesn't matter. BUT we're set up to it if we ever needed to prove to a...
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    Where's the G7 How To Guide 2009?

    Gordon, Wasn't trying to be funny. The HowTo was the first, yes, but the other stuff are updates and they were free up until recently I guess. Send me an email to disbellj AT gmail DOT com and I'll send you what I did freely download. Regards, Don

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