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    Fountain Solution Conductivity

    Umesh- good post. Fount has an "operating window" in the UK it is between 2-4% in solution [giving the pH required], historically pH readings were used to make sure we were within the operating window. The advent of pH buffering agents destroyed this relationship as you could be at the pH you...
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    Dot Gain and Density shift from G7 Targets (Web Press)

    Solid Ink Density is one of the biggest factors on press for increases in TVI/Dotgain and the fact that you are reducing SID's and getting increased Dotgain points to something being seriously out of whack. As you pointed out the increase in TVI across the majority of units suggests consumables...
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    Speedmaster PH

    Danos is correct in normal circumstances between 4.8 - 5.3 is fine most inks and plates work well within this range. Achieving the proper pH level varies with the fountain solution manufacturer's recommendations but also with the chemical composition of the water that is being used...
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    Speedmaster PH

    Are you in the US, UK or europe
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    Print contrast

    Oh and what can you use it for well a few things like monitoring your press [but frankly there are better indicators] mainly to ensure you are printing nice and open and not losing any detail, so you can use it to decide how often to wash your blankets
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    Print contrast

    As already pointed out relative print contrast is a measure of your dot density compared to your solid ink density. So you need to know your TVI for each unit and the shop or ISO SID values you are running. Once you have got these you can find out your contrast values thus: Get your dot density...
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    How to operate correctly harmonic drive/chill rollers?

    Hi Alois, not sure I understand what you mean by same circumferential speed as the the blkt-to-blkt cyclinders of the last unit could you explain this a bit more and how you would ascertain the speed of the cylinders. thanks
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    controlling dotgain

    Dotgain that deviates this much always has a reason, if it is purely mechanical then it would usually show on an individual unit rather than every unit. questions to consider Are the dot shapes the same for both jobs ? Has the SID increased/decreased as dotgain changes? Has the paper type...

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