Digital BW, The Print

Jack,

>I chose the Premier Art Fine Art paper 325 gms as "my paper".
>It's heavy, just a little creamy. It's got double sided coat, and the
>prints look really smooth and continuous tone.
>I use the UT1 with CIS on my 1280. After switching to Ebony
>I have no clogs anymore.
>I downloaded both available curves:
>neutral - UT80_PA_N1.acv,
>and warm - UT80_PA_W1.acv

>Neutral is like selenium prints - but it's not neutral - 
>it's bluish greenish.

Just in case the curve got corrupted, I've sent you the curve I have off
list.

>Is there any way to make it really neutral? with no bluish cast?

I'm not sure what the problem is.  There are a couple of possibilities.
First, the paper coating may have changed or the coating on that weight may
be different than what I have.  I used both the thin double-sided Epson
UltraSmooth and a roll of single-sided UltraSmooth that I have on the 7500
to profile the inks.  I also had some PremierArt samples that I checked to
be sure the coatings I had were consistent.  They were all about the same,
but with what could be random 0.01 density differences among them.

If there has been a change in the paper coating, the amount of toner put
into that neutral print may need to be altered.  That would be the "green"
curve.

A second possibility is that the magenta has been pulled out of the toner by
the CFS system.  Are EEM prints also greenish?  Is the greenish tint in the
light tones or dark tones?  What a couple of us with 7500s loaded with UT1
notice is that if the printer has not been used in a while the tones shift
about 0.01 unit green.  I think the magenta in the light toner is sticking
to the sides of the tube.  There is so little in the light toner that it
might be enough to shift the tone of the print.  I'm speculating here.
However, if the 1280 CIS has not been printing neutral tone prints in a
while, it could be similar to what we see with seldom-used 7500s.

>I printed a few prints with no curves at all (after converting to RGB).
>I understand that doing so not all inks participate in the process of 
>printing -
>but what actually happens when I print without the curves?

All ink "colors" print all the way to the lightest highlights.

>When I printed the wedge I noticed that the light patches were a bit grainy
>- coincidence or a fact?

The light cyan ink is a bit too dark to be used in the highlights without
showing some dots.

Paul
www.PaulRoark.com 

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