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  1. S

    % Web Breaks?

    I had some data from newspaper, but that was 37lb (24x36"), .002 mil paper. Looking for an industry benchmark, how many per n/100 rolls? Web breaks do occur!
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    % Web Breaks?

    Hello PrintPlanet, I was wondering if any of the heatset web offset printers can provide any stats on % web breaks? Using older Butler zero speed vertical festoon splicers. Better still, how long are you down before you restart saving and how many feet did that take? Most common basis weight is...
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    Understanding Color Calibration Process - I feel stupid - what am I missing?

    If you number the samples in your photo from left to right, 1-6, there are 3 close pairs. 1 & 5 yellow 2 & 6 magenta 3 & 4 blue Can you provide a Delta E (DE, dE) for those pairs?
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    Water type streaks in printing jobs

    The defect you show in the photo is a long vertical streak? Is it visible prior to printing, perhaps as a gloss difference? If you cut the sheet down so you can feed it through rotated 90 degree, is streak still there in the same orientation (machine caused) or did it also move (paper caused)?
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    OKI C931 CardStock Printing Very Dull Flat

    Can you provide close up photos, without glare, of good vs bad?
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    Recurring spot pattern on newspaper pages

    Most modern newspaper press use web offset (cold-set) lithography. The ink transfer from the plate (metal) to the blanket (rubber) then to the paper. If the rubber blanket is damaged, sunken inward, it will not transfer ink from plate or to paper. This is often called a smash or ding.
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    Mixing Ink Applications

    Whatever method is used, always note the version of the formula fan guide. Over the years, there has been revisions/changes. Mixing the correct formula recipe is no quarantine of a close color match (Delta E) mostly because of the substrate.
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    White Ink for Kraft Board

    Search previous posts about this same topic. Need thick ink film to get opacity. Multiple passes, dry trap, flexo relief plate, UV, silver base, screen print, foil stamp, etc.
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    Uv ink slinging on a Heidelberg

    To be precise, UV inks don't "dry", they cure. How did you evaluate UV Cure? Physical rub test, Chemical resistance. Are UV lights guarded/shielded so no light (radiation) is striking or "Flashing" the plate and curing there? Dry-up/catchup, tinting/toning, scumming/sensitivity all look...
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    "Less than" digital color management question

    Ask your vendor's (ink, paper, device) if they profile for you as a free service?
  11. S

    Fuji plate thickness

    You didn't mention what the specific quality issue is? Image sharpness from poor focus? Loose fit in press plate clamp?
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    Uv ink slinging on a Heidelberg

    Did roller vendor recommend EPDM composition?
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    Preventing springing edges in folded paperboard boxes

    A packaging structural designer or die maker should be able to answer that. I think a higher number of smaller perfs will be "stiffer" and have more memory. A folding carton packing QC lab often has a machine to measure force to open & close folds. Also, on the folder/gluer, how much of a...
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    No-Tox inks custom proof profile and plate curves

    Magnus, I agree with your statement. When an ink guy tells a press guy to run to a lower density, that might be interpreted as meaning a thinner ink film thickness (IFT). The ink fountain blade keys or ball/ductor sweep will be less because it's stronger. Doing a side-side ink draw down (Little...
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    Verifying full gamut RGB prints

    Low cost solution is bring both characterization data sets into Excel and calculate a Delta E for each pair of patches (1,617 if IT8.7/4). Then do some basic stats for average and standard deviation. Could even make a histogram.
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    Preventing springing edges in folded paperboard boxes

    Check the grain direction of both your and their samples? Are they using any perforations instead of crease/scores?
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    Color rendering with direct offset printing on brown kraft cardboard

    Outsource to a trade/packing printer who has a press with an UV anilox coater in unit #1 to lay down opaque white first. Use a flexo relief plate. If customer doesn't care about how the inside of the box looks, print on white litho wrap sheet to match kraft color, then emboss corrugate texture...
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    No-Tox inks custom proof profile and plate curves

    When you run an ink to a lower SID it usually for 2 reasons. 1) It is stronger, has more pigment concentration. 2) It has more dot gain, so you are compensating instead of making a new curve.
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    Yes, my brother Joe unfortunately passed away in March 2018 from a severe stoke. At the time he...

    Yes, my brother Joe unfortunately passed away in March 2018 from a severe stoke. At the time he was working for Heidelberg after being at GATF in Pittsburgh.
  20. S

    No-Tox inks custom proof profile and plate curves

    Do you know the Lab values of your current ink set, as well as SID (solid ink density) & TVI (tone value increase). Curious, if you changed ink vendors with regular inks, would you use the same old ICC profiles and plate curves or would you re-fingerprint?

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