QTR-Quadtone RIP

its also about the amount of light falling on the print. I was amazed once
to look at a lustre photo in the sun, that I thought had little detail in
the distance and suddenly I could see all this detail in the shadows that
was just not visible under normal internal light levels. if you look at 60 -
100% in full sunlight you'll see a difference.

Mike

On 23 January 2011 21:24, mrjimbo <mrjimbo@...> wrote:

>
>
> I'll probably get into trouble with this one but I think it's visual
> perception.. Luster paper has a micro surface that skews the reflectance...
> and mat papers have less reflectance then say a high gloss paper..Often
> times I look at a print and wish the blacks were better.... Put a piece of
> glass on it and it pops.. I would suggest still going for the dmax.. and not
> settling for a lower one as it "appears" to be the same.. Try viewing the
> 60% and 100% blacks under glass at the same time .. it should be visual then
> I would think.
>
> jimbo
> ----- Original Message -----
> From: Terry
> To: QuadtoneRIP@yahoogroups.com <QuadtoneRIP%40yahoogroups.com>
> Sent: Sunday, January 23, 2011 12:49 PM
> Subject: [QuadtoneRIP] Re: Maximum Usable Black vs. Dmax - What's the Big
> Deal?
>
> Does anyone have a comment on this observation I've had in working with
> QTR?
> Thanks.
>
> --- In QuadtoneRIP@yahoogroups.com <QuadtoneRIP%40yahoogroups.com>,
> "Terry" <TerryGls@...> wrote:
> >
> >
> > As I understand when printing out the Ink Separation Page in QTR, the
> Photo Black (PK) or Matte Black ink (MK) at 100% is the maximum black. Yet
> visually, on most Luster/Pearl/Semi-glossy papers, the 55, 60, or 65% ink
> square is as black looking as the 100%.
> >
> > For example, when I measure the 100% PK ink square on Harman Crystaljet
> Luster RC paper, printed with Epson inks on my R800 / R1800 with my
> densitometer I get 2.64. The 60% black measures 2.13 yet visually looks as
> black as the 100%. The 60% is typically chosen to create the QTR profile yet
> the maximum density achievable is never really used. This general
> relationship is the same for all Luster/Pearl/Satin/Semi-gloss papers I've
> tested.
> >
> > Yet for the inherent difference between Luster & Matte papers what is the
> "big deal" about high Dmax and can you really use the 100% in creating a
> profile?
> >
>
> [Non-text portions of this message have been removed]
>
>  
>


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