RonYnzunza
06-03-2008, 09:37 PM
We are running a Digimaster with B&W variable info on top of shells that are 4 color masters that were printed on our offset press.
We will let the preprinted uncoated masters dry for at least 3 days before imprinting on the digimaster. When we do the rollers get an ink build up that has to have a service tech come out and clean the machine. The toner will sometimes get contaminated & need to be cleaned out and replaced. We have tried several ink manufacturers that are "laser safe" but we end up with the same problem.
Is anyone else imprinting on preprinted offset sheets? What type of inks are you using? Are you coating with aqueous or varnish?
We also have an indigo and it isn't a problem for the indigo because the pieces that come in contact with the sheet (blanket/PIP/impression paper) are operator replaceable.
We will let the preprinted uncoated masters dry for at least 3 days before imprinting on the digimaster. When we do the rollers get an ink build up that has to have a service tech come out and clean the machine. The toner will sometimes get contaminated & need to be cleaned out and replaced. We have tried several ink manufacturers that are "laser safe" but we end up with the same problem.
Is anyone else imprinting on preprinted offset sheets? What type of inks are you using? Are you coating with aqueous or varnish?
We also have an indigo and it isn't a problem for the indigo because the pieces that come in contact with the sheet (blanket/PIP/impression paper) are operator replaceable.