Re: Rips
Re: Rips
- Subject: Re: Rips
- From: Roberto Michelena <email@hidden>
- Date: Thu, 19 Sep 2002 01:15:25 -0500
On 17/9/02 4:05 PM, "DuWayne" <email@hidden> wrote:
>
It assumes that the printer is not in a repeatable fashion. This isn't true
>
because Heidelberg tested Epson & Roland's over months when developing
>
proofing systems and found that they vary by .40 & .35 delta E. Even in a
>
very controlled environment too may other factors came into play like the
>
spectrophotometer precision is +-.25 Delta E.
I don't know if thigs have changed a lot lately, but from my experience with
Epson 5000... Grab a pair of these and print the same target on both. You'll
easily get 10-20dE difference. When trying to make linearizations that would
allow to use a single profile on all of them, you have to find what's the
lowest performer of a group and cut back all the others to match it.
I've done this on over 10 individual printers, and the differences between
them -in raw state- have always been quite large.
Maybe the .4 dE you quote is the same printer printing in two pages, or in
different areas of the page, or something like that.
-- Roberto Michelena
EOS S.A.
Lima, Peru
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