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    Question about ink rub

    What about the inks. Is he using quickset or heatset, uv cured? The type of ink in addition to the substrate will affect rub-off. You can coat the shit out of anything bust gordon is right: varnish does yellow over time. Aqueous is basically a water-based plastic.
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    Sucker feet marks on poly plates...

    Sucker feet Sucker feet That seems way to early in the run for the plate to become sensitized. Should get over 50M impressions on a poly plate. Two thoughts: 1) Are you adjusting impression for the variably thick envelope? 2) Check you plate chems. The developer or fix could be bad. Angelo
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    Parts for Heidi QM 46

    Hi Everyone, I need a dampening bottle cap for a Heidi QM 46. Where can I get one? Thanks in advance. Regards, Angelo
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    Trying (and failing) to print gray digitally

    I misspoke in a previous post. I meant to say GCR or Gray Component Replacement is sometimes used in offset to replace process grays with blacks. Perhaps some similar option exist for digital presses.
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    Introduce yourself!

    My name is Angelo. I am a Graphic Communications instructor at a technical high school. I have over 20 years experience teaching as well as about the same in the industry as a production manager of a newspaper chain (web offset). Prior to that I ran a design studio and did print ads. Due to...
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    random black splotches on sheet fed press

    Emulsification or ink tack. Is the pressroom hot and the press running high speed?
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    Trying (and failing) to print gray digitally

    As others have posted, you don't mention the machine. However, as with offset, perhaps you can consider UCR and UCA (undercolor removal and undercolor addition). Typically a 4 color process gray will be composed of all 3 primaries and some black. UCR replaces this process gray with a certain...

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