Digital BW, The Print

Some time ago I have been complaining about "ugly vertical stripes" 
with a StudioPrint demo version and an Epson 7600. Meanwhile I could 
isolate the problem: it seems that it only occurs in one of 
the "variable" dot modes. 

To be sure that it is not my new printer: could you please print a 
cmyk wedge (each channel continually varies from 0% to 100%) without 
any profile attached and see if the tonal variations are really 
smooth and monotonously increasing ? Print environment settings: dot 
size = "variable1" or "variable2"; resolution =1440x720 dpi, 
dithering = "stochastic" or "error diffusion" or "smart diffusion".

It would be great if you could help me with doing this test. I am in 
need to soon make a decision which RIP to buy (ImagePrint or 
StudioPrint: the ImagePrint demo does not seem to make any problems 
with stripes but I like the free choice of ink controls and ink 
limiting settings in StudioPrint and the possibility to use PiezoTone 
Neutral and Cool inks together). 

Many thanks in advance,
Peter

peter baumbach - fine art photography
http://www.pb-photo.com