My company has been printing a particular job on a standard 24 point coated SBS stock with our akiyama 40” 6 color press for many years. We have recently started printing this job (same stock) on our 50” KBA rapida 8 color without much success. A special green build in the file with only 9% yellow prints very very yellow on press. The plate curve (stochastic 25 micron) for the akiyama brings the 10% yellow dot down to a 7%. The KBA has it’s own profile and brings the 10% yellow down to 5%. This was not good enough to match. I had to reduce the yellow in this area to 3% ( I created a special reduction plate curve) to get the match. Why would the KBA gain so much (yellow only it seems) in this 10% range? Does anybody have any ideas? I know this is not really a prepress/plating issue, but it seems today that prepress needs to know more and more about the pressroom than ever before.
Thanks in advance
Thanks in advance