Question about Riso RZ220 Duplicator

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Risograph Drum I have a Risograph RP3100 that we have not used for a couple of months. When we tried to use it there is what I would call a dry spot on the drum and the text in that area does not print. I tried pulling the master back and rubbing the area with alcohol but that did not help. Any ideas????

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  • Anonymous Sep 18, 2008

    i have the same problem with CR1630. was the problem resolve with the suggested solution?

  • RichMcA Mar 11, 2009

    I haven't tried this yet but sounds like best idea yet.

    Get a can of WD40 and spray it under the master, then rub the area with your finger. this will desolve the dryed ink on the drum surface.

    I'll try it soon.



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Try run a hundred copies at slow speed and full density/ pressure.
If that fails get a can of WD40 and spray it under the master, then rub the area with your finger. this will desolve the dryed ink on the drum surface.

Posted on Mar 08, 2009

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Run a lot of copies.. when i mean a lot i mean a lot it can take about 1000 or more copies..

Posted on Sep 12, 2008


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Hello I have to run a risograph tr1510 that have not been used for a couple of years or more. The drum are completely dry. I read this post:

I don't think WD40 oil is the best solution.

I had to do such a procedure a few months ago. - I got a drum which was not in use some month. This is normally no problem with original ink. But some cheap plagiators have their own ink recipe.

I used a solvent for professional offset printers. It is the one to clean the ink rollers with. it was blue colored and I think it is so with most manufacturers. (I have seen some brands for this purpose and all were lighter or darker blue.)

By the way, it isn't so easy as it seems: The drum looks clean enough after some time. But to remove really all of the hard and gummy ink inside I had to take the drum apart. It took so much time and was so dirty so I will do this again only if I get paid accordingly.

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