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[argyllcms] Re: Profiling flexo presses

From: Jan-Peter Homann <homann@xxxxxxxxxxxxxxxxxx>
To: argyllcms@xxxxxxxxxxxxx
Date: Mon, 22 Aug 2005 17:01:10 +0200

Hello Roger Here in Germnay the ECI 2002 Target is very succesfully used for profiling flexo. It contains 3% steps for every colorcombinations and 1,5% for pure CMYK.

For getting good flexoresults the linearization incl. bumpup is the key.

The bumpup is needed to get a well defined first printing point.
The linearization is needed to correct the middle-tones offset-like

typical results file->print in germany are:
1%->0%
2%->7% (bumpup)
50%->66% (linearization for offset TVI)

Most flexo-printers get offset-data, which has to be converted to flexo.

This could be solved with a devicelink from argyll. Input-data could be SWOP and destination-data your flexo-values.

:-) Jan-Peter

Roger Breton schrieb:

If your profiling target has 2% and you don't use a bump curve that
linearizes the *printed* highlights, you will have values starting at
15% or so; basically you'll be using your profile as a rudimentary
linearization, which is not its function.

Roberto,

How do you propose to use a bump curve that linearize a 2% dot on press?

Roger Breton  |  Laval, Canada  |  graxx@xxxxxxxxxxxx
http://pages.infinit.net/graxx

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