Metalics emulsifying, but only on one side

Discussion in '4-Color Offset Presses +' started by Pressman Jay, Dec 16, 2011.

  1. Pressman Jay

    Pressman Jay Member

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    When I run gold first down, it emulsifies after about 10,000 imps, and always creeps in from the gear side. roller setting?
     
  2. Data

    Data Senior Member

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    Yep check your dampers then inkers. Also minimum damp and dont load the ink. If a low turn over run a tape on front plate edge if cuts off afterwards.
     
  3. Pressman Jay

    Pressman Jay Member

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    I don't understand, more detail please and thankyou :)
     
  4. spike

    spike Senior Member

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    Jay try running nonintergrated minimum water this may help metalics are pain in the ***
    however 10.000 imps is not bad iwould rinse rollers at least once on arun more than 10 .000
    spike.
     
  5. Data

    Data Senior Member

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    Apply a strip of 50/60mm brown packaging tape along the front edge of the plate below your trim marks down over the front edge bend in the plate, or run a strip up the side youre getting emulsification.
     
  6. turbotom1052

    turbotom1052 Senior Member

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    as someone mentioned minimum water and non intergrated. I also like to whenever possible take one step up in the pms book. For example if your printing a pms 872 gold i look to run pms 873. The 873 will allow you to get the richness without having to run such a thick ink film which in turn leads to scumming and emulsification issues. Ive always found it very difficult over the course of a longer run to match the pms book with a single hit of any metallic ink. You need to remember that pms books are printed dry offset and neednt contend with the scumming issues we all deal with on a press running water. A little water repellant varnish or body gum added to the ink will also help in many cases.
     
    Last edited: Dec 18, 2011
  7. Pressman Jay

    Pressman Jay Member

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    Well thanks for all the good ideas, I now have some tricks to try next time I run gold (yes usualy 872) never heard of putting tape on a plate unless the plate was cracked, but sounds like it's worth a shot. I like the idea of running 873 inplace of 872, as we run 872 alot, most runs seem to be around 50,000 imps (@6500 sph it's painful lol)
     
  8. Data

    Data Senior Member

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    yeah painfully slow...lol
     
  9. Kaoticor

    Kaoticor Senior Member

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    Ug.... I cant stand running 873 gold hah. Same thing though that the other posters brought out in keeping dampening to a minimum. The water window in that ink is very tight. We actually start the job with almost no dampening feed and bring it up as soon as we see catch-up, just to make sure it doesn't over-emulsify. Seems like once it over-emulsifies, it is never right after that for the whole run!
     

  10. Data

    Data Senior Member

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    Add some Uv gold paste in your mix