Re: [ECI-EN] ECI-EN Digest, Vol 16, Issue 2
7 Jun
2007
7 Jun
'07
12:54 a.m.
Thanks to all who have replied, I have learnt something and will put it
in to practice straight away!
On 6 Jun 2007, at 11:00, eci-en-request(a)lists.callassoftware.com wrote:
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> Today's Topics:
>
> 1. ISO Newspaper26v4 and Tone Value Sum (M. Frank)
> 2. Re: TAC in ISOnewspaper26v4 (Roger Breton)
> 3. Re: TAC in ISOnewspaper26v4 (kristoff.decroix(a)roularta.be)
> 4. Re: TAC in ISOnewspaper26v4 (Peter Kleinheider)
> 5. Re: TAC in ISOnewspaper26v4 (junglas(a)ifra.com)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 5 Jun 2007 13:56:06 +0200
> From: "M. Frank" <m.frank(a)get2net.dk>
> Subject: [ECI-EN] ISO Newspaper26v4 and Tone Value Sum
> To: <eci-en(a)lists.callassoftware.com>
> Message-ID: <006701c7a768$81377080$2101a8c0@dtp>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi xxx
>
>
>
> There is a limit being applied by the profile, but it is dependent on
> the choice of rendering intent and Black Point Compensation.
>
> The profiles default rendering intent is perceptual. Try without "Use
> Black Point Compensation" Then you get 240%.
>
>
>
> According to ISO12647-3/2005 SE - Coldset offset lithography on
> newsprint
>
> 4.2.7 Tone value sum
>
> Unless otherwise specified, the tone value sum should not exceed 240%
> and shall not exceed 260%
>
>
>
> NB. Should not exceed 240%, not necessarily 240%.
>
>
>
> Maybe this will be of interest:
>
> By John Nate - Special to Newspapers & Technology
>
> "All of our recent testing and all the recommendations by the
> Newspaper Association of America and Ifra recommend using perceptual.
> While relative with black point of the destination works for many
> print environments, perceptual simply gives us better results in
> saturated and shadow colors today while maintaining good tonality
> through the printable tone range".
>
>
>
>
>
> Best regards
>
> Mikkel Valentin Frank
>
> Copenhagen Polytechnic - Technology and communication
>