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    The printing of simulated spot colour with CMYK screens.

    I find that your raw supplies make a real difference. We run an ink that, depending on the screening, gobbles up water significantly. This leads to some...unpredictable....dot gain in certain screen combinations. If I ran a blue, a purple, and a red in line with each other, the magenta ink...
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    Frank Romano complains about colour management.

    Other than the fact that so much of this goes over my head..... The simple fact is that we are hunting for a grail here. With customer expectations and market materials available, we will always be adapting to new conditions. Constant adaptation is no basis for a stable standard, IMO. At the...
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    Rough edges in web printing

    If dampening doesn't solve, it may be your paper stock is 'bleeding'
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    Colorbars, print contrast, tints, relating to G7

    I think I'll toss in at this point.... I agree wholeheartedly that ultimately once the press is set up properly, all you should need to do is run to SD. That being said, I have found that when the operators have a full knowledge of the entire process, they are interested in knowing what the...
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    Conductivity issue?

    Well, if running less fount works better, all the power to you! We had a fountain solution from Huber at one time. Recomended dosing was about 3 oz/gallon or less; we couldn't get the plates to run clean unless we ran up at 5 to 6 oz/gallon. But when we did - amazing! Minimal piling, minimal...
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    Primarys are out

    And just a side point....why isnt the printer doing his own scans. Probably more helpful for him to scan and adjust as he prints that for you to be coming back to him later....
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    Ink contamination with paper lint

    An option, albeit a not very good one.... Raise your forms of the plate till they are barely touching it, like i mean the hint of a stripe. When you start printing you will have to flood the train with ink in order for it to transfer (same with the water system). But minimizing that contact...
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    BLanket issue

    The last thing to change is usually the problem....you changed your blankets, now you have problems....so...blankets! Get the tech in
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    Marking issue

    Just throwing this out there, but.... do you have a short smoke tunnel on exit of dryer? I have seen marking come from the web exiting the smoke tunnel and still fluttering. It would look like it was coming from your dryer but is actually just afterwards.
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    Spotted/mottled background print result

    Leaving Erik's usually fascinating comments on the nature of ink aside..... If it is one corner of the print, probably a low blanket - mottle with heavy coverages is a very typical pressure problem that has nothing to do with emulsification. Paper is also an option, however, you could rule...
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    Munsell Hue test

    Score of 3.... These are always fun, but so highly inaccurte. I remember reading somewhere that since your brain works by electro-chemical impulses, it is actually possible for the meal you have just eaten to slightly skew the way your eye communicates with the brain, hence changing colour...
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    Ink consumption

    Too high a humidity level does affect ink/water balance....it increases the emulsification. That excess emulsification may require running a thicker film to achieve same apparent results, so corresponding increase in ink consumption. As for humidity of the paper board itself, it ultimately...
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    Finishing gum in fount solution

    I be been there and true that and will never try again. I leave fount formulation to fount formulator
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    Goss Community issues

    Interesting that you mention summer... I am with everyone else, if your settings are good, it is more than likely the ink. If your manager doesn't mind spending the money, get a better ink. Get the company to come ina nd look closely at the situation. And if they tell you it is anything other...
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    Goss Community issues

    Well, that is one huge can of worms you just opened, but..... The whole issue sounds as though you have a major incompatibility with your ink/fountain solution. But here are a few starting steps to prove it to your managers: 1) Ensure the press roller settings are at recommended settings...
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    Goss Community colore registration/pull in problems

    I am with Robert L on his last comment - see if you can use a web growth profile in the CTP workflow to correct. Messing with the pressures in your units can have too many other undesirable results - especially if there is an easier way to correct upstream.
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    Paper Warping on KM C70HC - Newbie Question

    What sort of print coverage are you looking at? Pure volume of what you are printing on the stock may be the cause. If so, blwo drying should be a permanent solution (no re-curl)
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    Moire' Pattern Trouble

    And good point to Gordo as always.... A picture would be helfpul
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    Moire' Pattern Trouble

    Dumb question, but, have you tried running the image in different position? What I mean is if the image is from the same file that was run on your smaller press, it seems you have registered it to the lead/drive side. Why not shift it to register to the tail/operator side and see what happens...

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