Hello Paul
I agree with you that maximum ink amount of 350% can be a problem depending
on image content and original RGB values in dark end (RGB0~350%,
RGB10~330%). We would also recommend ~320% for most better papers in
heatset. But when choosing between ISOcoated and ISOwebcoated I would say
that in most cases on better quality papers ISOcoated would still give
better results.
When talking to our customers (heatset printers) there seems to be many that
don't think 350% being problematic but also very many that says 300% is the
maximum.
BR Jouni
-----Original Message-----
From: eci-en-admin(a)lists.transmedia.de
[mailto:eci-en-admin@lists.transmedia.de] On Behalf Of Paul Sherfield
Sent: 5. huhtikuuta 2005 10:59
To: eci-en(a)lists.transmedia.de
Subject: Re: [ECI-EN] Re: TVI and ISO ICC profiles
Marttila Jouni wrote
Hello Paul
First I would use the curves that correspond to the
ISOcoated/ISOwebcoated printing conditions. If you look at the
characterisation data of the standard profiles it quite clearly gives
around 14% dot gain in 50% for ISOcoated and around 17% for
ISOwebcoated. So this would mean curve A for ISOcoated and curve B for
ISOwebcoated
Secondly I don't think ISOwebcoated profile should be specified as
heatset web offset profile. To us as papermaker it makes more sense to
categorise these profiles according to paper type than printing
method. We e.g. recommend for many of our heatset grades (bluish shade
better quality
papers) ISOcoated profile rather than ISOwebcoated, which suits well for
standard LWC's (yellowish shade).
BR Jouni Marttila
Using ISO coated, even if the TVI was adjusted via process control at plate
output could give issues, web breaks and drying, with a TAC of 350%.
Is any web printer using the ISO coated conditions? Comments please.
Regards
Paul Sherfield
The Missing Horse Consultancy Ltd
Telephone: 01442 871752
Mobile: 07899 906385
Apple Solutions Expert-Print & Publishing
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