The grayscale printing problems from CS4 on OS X 10.5 are on going as far as I can tell. My opinion is that is it's a design bug of how the application and the operating system should interact to handle color management - essentially grayscale was not in the plan. It's hard to tell for sure because there are some hidden, mostly undocumented things going on. I submitted a bug report back in January to Apple and had a good dialogue with them till I think I convinced them they had a problem. (btw, CS4, LR, and even Aperture all show this). Now the bug is just Open and they say they are looking into it -- "we'll let you know". So - where does this all leave us? My first choice is keeping CS3 around just for printing. Use CS4 for all the editing and then just think of CS3 as the separate printing program. If you only have CS4 there is a workaround that I've found for now but who knows about future systems. Here's the way to do it for grayscale: Assign "Generic Gray Profile" to the stepwedge or target image. Print with "Photoshop Manages Color" and Print profile of Generic Gray. Roy --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tyler Boley" <tyler@...> wrote: > > yes I remember. Still, you shouldn't have to do that, it's really best to print the chart exactly as the eventual files you are printing with the resulting profile will be printed. > It may work fine though. The way we always did it was simply convert to multi channel, duplicate twice so 3 channels, then back to RGB. Used to have to do stuff like that all the time to RGB and CMYK, and just made an action. > None of this should be necessary though, has Roy commented? > Frankly I've just stayed with CS3 until I start hearing more "all clear"s from CS4 users. I'm paranoid... > > All you can do is try it. > Tyler > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Keith R." <kjrslr@> wrote: > > > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tyler Boley" <tyler@> wrote: > > > > > > never convert or alter a profile creation chart, it will make the resulting profile invalid. CS4 has created some color management dilemmas, one would hope that Adobe, of all people, would keep the color management processes viable over time. > > Thanks for the reply Tyler. Don't know if you've seen this converter from Ernst Dinkla's site: > > http://www.pigment-print.com/Quad%20QTR/Index.html > > > > In particular, the Tiffconvert app: > > A straight (and odd) converter for Greyscale to RGB and CMYK. Each color channel gets the same values the greyscale had. So no black generation changes in the CMYK file. Originally used to print B&W Quad and Hexatone inksets on a pure CMYK based RIP system. Written by Gert-Jan de Vos. > > > > Seems like just the thing to overcome the CS4 problem. > > >
Message
Re: Help making BW profiles
2009-07-05 by Roy Harrington
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