Digital BW, The Print

Hi Nick-

I'm not doubting that you have the problem at all...nor surprised to 
hear of some shift with dye inks (at least during drying period of a 
few days), but I am surprised to hear of GREEN shift.

Almost sounds like the old Piezo "Greenies" which were a real curse 
to those who had it. Just to be safe you might try some of the things 
that worked for them...the same as for monster clogs...paper towel 
under print head cleaning, some purges with good cleaning carts and a 
purge image, etc.

You don't mention if this happens with other papers than HPR? how 
about if you DON'T coat it? same problem? same timeframe? Just to 
check everything (don't feel insulted)...did you use a cleaning cart 
when you switched inksets? (never a bad idea even if the inks 
are "compatible" since you have to flush anyhow).

I guess the other possibility is that you have some carts from a bad 
batch? You might try some from a different source...and if they work, 
then return all the ones you have from your current source. This is 
actually a decent possibility...the dye inksets from whatever source 
just have many fewer problems than the pigment inks for a variety of 
reasons that relate to the size of the particles in the suspended 
liquid (not to mention that the printers were designed for dye ink).

I guess the only thing I can think of I haven't mentioned that you 
might want to check...what do your nozzle check patterns look like? 
have you done a purge sheet to see if all the nozzles are printing 
full force? have you done a step chart to see how the ink is being 
laid down across the 0-255 range?

maybe some of the others who have had LSG go green on them can chime 
in so we can have more data on what the problem really is...

Tom O'Connell