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Chris, Just out of curiosity why do you want to use XYZ instead of LAB?

Yes indeed and I did do this, well a variation of what you state above anyway... I did some more research thanks to everyone who posted and found that running the file through Alwan does in fact apply GCR to the file and what looked like was hurting us was the Dynamic GCR settings. Now, I'm not...

It is not uncommon for the slip roller to have some ink buildup on it while running however this should be minimal and should definitely not effect print quality or make ready waste. As John said it may very well be that your rollers need to be cleaned and deglazed however from my experience...

Gordo, Ok - I'm tracking now...took me a while but I do understand what you're saying on there being no industry specifications for dot gain. So...in your opinion what do you think would be acceptable dot gain variation to see run to run and day to day on a brand new 6 color heatset web? Jud

Hey Rich, Thanks for the unintentional tip - yes! The curves are being applied to the color bar which explains by variations in dot gain from the "raw" run to the "verification" run. Jud

Hey Gordo, Thanks again for your input however something just occurred to me as I was thinking over your answer in regards to the gain differences that I posted yesterday. The gain readings are being taken from the color bars and the on press CLC cameras. It therefore doesn't make sense that...

Alois - do you really think we would see dot gain differences between rolls of paper??? Our main paper is Influence Gloss and we only get it from one mill (Verso's Quinessec mill). Thanks for the PDFs. You don't happen to have any TAPPI standards on tolerances for variations of paper color do...

Hi Gordo, Again, thanks for your input here. I am sure that our dot gain differences are caused by our new plate curves. You're totally correct. I do know that dot gains are not targets however my main question is what is the best handling when I do see shifts in our dot gains and how much...

We absolutely use LAB both on our hand held and on our on press CLC system. I know many printers in North America that use LAB.

Hey Rich, Did check the plates, this was the first thing that I checked. They are imaging correctly. Same paper, same pH, came conductivity. Now, here's what's driving me nuts: Did a test run yesterday on Influence Gloss to check our plate curves. On the raw (no curves) run I had dot gain...

Hey Erik, Thanks very much and you are definitely correct. We have tested the system as compared with the press to determine if our issue lies from mechanical settings with the press itself or with the CLC system. In this case the problem is a bit of a combination of both. Last night I had my...

Hi Erik, Yes - the press, since installing this upgrade seems less stable. Color fluctuating and density targets randomly changing themselves throughout the press runs. Jud

Hi All, Our Goss Sunday 2000 has GMI's closed loop color control system and we recently (about two weeks ago) upgraded this to their latest system and we are having some "interesting" color control issues. Is anyone else out there running GMI's new Clarios system on their presses? Jud

Hi Al, I did bring it up with Rototdyne and they said that I could have gotten a similar roller to Heidelberg's Lototech roller and that "of course Heidelberg would tell me I need to use their rollers", etc etc. I am very well aware of Heidelberg pushing their consumables, rollers, etc however...

We were having the same issue on our XL 105 and we had Heidelberg service come in and take a look as we tried everything and couldn't figure out what was causing the problem. We had switched to Rotodyne rollers and Heidelberg suggested that we go back to their water pan rollers which I ended up...

Hi Jon! Thanks for responding. Are you using the GCR functionality in Alwan? Do you mind sharing what settings you are using? Jud

Hi Rich, Well, I'm in Los Angeles and we unfortunately don't have an autumn...our facility is also fully climate controlled - temperature and humidity so I can't really blame the weather for the shifts that I'm seeing... Best, Jud

Hey Gordo, we have our own density targets which we came up with as a standard. K = 1.60/C = 1.43/M = 1.32/Y = .92. I would love to post microphotos of the dots of my press sheet but how do I do this? I have taken a digital camera on its macro setting and held this against a loupe on press and...

Stephan - We were earlier printing Sublima 240 on the web however we found that this was more difficult to color manage so we have been running at 200 conventional. I have not tried any other line screens with our GCR settings but I think I will. Have you tried this? Thanks Alois! I will look...

Thanks Magnus, They muddy greyish look we are seeing on press is specifically in the 3/4 tones and shadows. We use Alwan to handle not only our GCR but the file is also gamut mapped and optimized for the presses. Alwan then sends this file into Apogee (Agfa's prepress workflow) which applies...