Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Harry Lockwood" 
<hflockwood@...> wrote:
>
> Over time, I've been aware of posts here regarding banding in prints from various 
> machines.  I didn't pay a lot of attention because I wasn't having the problem.  Now I am 
> having the problem.
> 
> I've done a search in this forum and found that the diagnoses are all over the place, 
> depending on specific machine model, inks, cartridges, paper, etc.  If anyone can 
provide 
> some guidance I'd be most appreciative.
> 
> Here are some details:
> Epson R2400
> K7 inks in Superjet USA CISS (just recently installed as an experiment)
> Epson Enhanced Matte paper
> QTR settings standard with 2800 dpi and unidirectional printing
> 
> Test target: Jon Cone's proofofpiezography.psd
> 
> All tones are clearly visible, down to and including 1%, on the test strips.
> 
> Problem: faint banding becomes visible at the 25% level and below.
> 
> Any thoughts on how to make progress toward a diagnosis?
> 
> Harry
>

I spent a lot of time trying to track down the source of this problem.  It became clear that 
two channels, the Cyan and the L Cyan were the culprits.

Before loading Epson carts back into the printer and taking it in for repair, I did an auto 
head alignment.  I wasn't expecting much because I had recently done an alignment just 
for general maintenance.  Wrong!  Problem solved.  Dodged a bullet.

Harry