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Digital BW, The Print

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Message

RE: [Digital BW] Dots and More Dots

2004-05-22 by Paul Roark

Bernie,

I'm not sure where the lot # is.  Since you have a CFS, I'm not sure the
problem would apply to you anyway.

Yesterday you described the problem as follows: "...in the darker grey zones
- like shaded zones of skin - I get a relatively coarse black grain which
looks a bit like "snake skin" ..."

I have a 1290 on loan here, so I printed a 21-step test file on Ilford
Galerie Smooth Pearl with the 1290 and UT2 inkset.  I used the 1280 UT2
neutral curve that is designed to print on that paper even though Eboni is
installed in the printer.  

The 1290 print looks very much like the 1280 print.  With a magnifying hood,
I can see the dots.  They look about the same as the 1280 dots.  I doubt
these are what you're referring to, however.  I don't have a working 1160
any more, but I'd be very surprised if the 1160 shadows are better.  

Do others find the 1280 shadow dots with the 1280, UT2, and Ilford Pearl of
Epson Semigloss to be a problem?

The 1290 print is a bit darker.  The photospectrometer readings give me a
50% density of 0.64.  This is just slightly darker than my 0.61 target.  On
the 1280 it's coming in a bit light today at 0.57.  The 1290 75% patch reads
1.13, which is darker than the 1.04 of the 1280.  The 1290 dmax is 2.32; the
95% comes in at 2.01.  This separation could be better, but in good light
it's not that far off.  On the 1280 the 95% patch is 1.92.

The "snake skin" look you describe reminds me more of what I'd expect if the
paper were being over-saturated with too much ink.  The Ilford Pearl is
sensitive to this, which is why we use the "Photo Quality Ink Jet" paper
type setting with it.  The Epson Premium Semigloss, however, should be able
to take the full "Photo Paper" setting ink load.

So, bottom line, I don't know what is causing the effect you're seeing.  I
suspect it is more than the very small dots that are in the UT2 shadows.  I
would like to hear from others as to whether they think the UT2 is too rough
in the shadows.

Paul
www.PaulRoark.com 

For UT2 & UT7 information, curves, and settings see:
http://home1.gte.net/res09aij/
____________________________________

-----Original Message-----
From: Bernhard Sch. [mailto:albatros-@...] 
Sent: Saturday, May 22, 2004 8:42 AM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] Dots and More Dots

----- Original Message ----- 
From: "Paul Roark" <paul.roark@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Saturday, May 22, 2004 6:25 PM
Subject: RE: [Digital BW] Dots and More Dots

>Bernie, I think the issues you raised yesterday indicate a problem with
your
>particular setup or carts.  Have you checked to see if the cart is one of
>the defective lot?

Paul, as I already asked yesterday: Where do I find the lot number? DO I
have to take the CFS cart out of the printer, and, is this recommended? From
the outside (with the carts in the left position of course) I cant see a
number on it.

Thanks, Bernie




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