Dampening solution mixing

Discussion in 'Heidelberg Printing Presses' started by Raman karthi, Jan 7, 2021.

  1. Raman karthi

    Raman karthi Member

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    Dear valuable members,
    I am working in Heidelberg CD 74 model is 2003, there is not measurements automatically alcohol and fountain solution, please can explain how can I prepare correct mixing dampening solution and maintain everyday with proper pH valuable, even there is no have ph and alcohol meters. And when can I change dampening solution.

    Thanks.
     
  2. asem alsafady

    asem alsafady Senior Member

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    Dear Raman
    IPA alcohol dose 6-9%.
    Dampening solution dose 2-4% (the percentage is written in the product).
    But at least, you have to buy Alcoholometer to measure your IPA 3-4 times a day, as it evaporates quickly.
    If you can check conductivity, then measure it when your mixture is fresh, and change the solution when the conductivity increases by 1000.
    Otherwise, check your solution visually and change it when you feel it becomes dirty, or once a month.
    Good luck.
     
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  3. Raman karthi

    Raman karthi Member

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    Thanks sir.
     
  4. Raman karthi

    Raman karthi Member

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    Dear sir,
    I have seen a problem in 1 unit image is week by 3/4 from operating side towards to drive side, and image week is completely from gripper to tail. in 10k impression,
     
  5. Ali Adnan Khalid

    Ali Adnan Khalid New Member

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    If the dampening circulator is from technotrans , u have the retro fit options to add ph,conductivity and alcohol unit.
    cheers
     
  6. asem alsafady

    asem alsafady Senior Member

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    Sorry, but I cannot understand your question.
     

  7. Raman karthi

    Raman karthi Member

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    Dear sir,
    Image is week week very quickly in a printing unit, printed only 15000 impression. And other unit is okay.
     
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