Roberto, > The big problem in flexo is lack of linearity in > the highlights, big changes of slope and dot loss at some point which > I believe is 3% or 5%, don't recall exactly (of course depending on > linescreen, but usually specified at 133lpi). Again, all the flexo printers here for which I built press profiles have no problem maintaining a 2% dot through a run. > If your friends are routinely printing 2% dots in flexo at 133lpi or > higher, there is a bump curve. No bump or transfer function curve anywhere. Imagesetter output is just well linearized and transfer to plate is constant -- no one looses that critical 2% dot up to the press. And the press holds it easily. That dot gains like hell (2% to 18% on some systems) mind you, depending on the aniloxes used. > The digital screened file does not have > 2% there, for sure. Of course it does, Roberto! How else would you transfer a 2% dot on film to plates to press? > Maybe the curve is implicit in the RIP (there > are/were dedicated rips for flexo such as the AlanRip), or somewhere > else you haven't noticed, or maybe it has been applied to the file in > Photoshop or whatever. There has to be a curve. The curve in the RIP is only there to make sure that a 2% in Photoshop remains a 2% on film, a 50% in Photoshop remains a 50% on film, and so on. > -- Roberto Michelena Regards, Roger Breton | Laval, Canada | graxx@xxxxxxxxxxxx http://pages.infinit.net/graxx