Digital BW, The Print

FWIW, I have successfully used the 2000P driver to run a 1200 using
Gen4. So, the 1270/1290 driver on a 1280 should be no problem.

Lloyd


-----Original Message-----
From: Paul Roark [mailto:paul.roark@...] 
Sent: Tuesday, December 03, 2002 9:47 PM
To: DigitalB&WPrint
Subject: [Digital BW] Epson 1280 (was VM quad or hex?)


Peter,

You wrote:

>I have a 1280, and I've seen this "bump."  Its a place between the dark

>tones and midtones where a small change of tonality on the screen 
>causes an abrupt change in the print.  ...
>  Which curves did you say were the least problematical?

The "warm" curve is the most problematic.  The problem is that, unlike
many/most of the drivers, we can't hold the toner curve (magenta ink
spot, green curve in the hextones) up to the top (meaning the toner ink
is not flowing at all) and then drop the curve very steeply only fairly
far into the shadow tones.  The 1280 PC (uncertain about Mac) driver
appears to have problems with the steepness of green curve that is
needed to do this.  It is most happy with mildly-sloped curves.

So, the best curves for the 1280 PC are those in the more neutral range.

>I'm wondering if we might be able to use the 1270 driver on the 1280?

It might be worth trying that or the 1290 driver.  Both of these
supported very steep curves without much of a problem at all.

I think the 1290 is the best printer I've used.  I think most consider
it mechanically equal to the 1280 (except a voltage/power-supply
difference), but it appears to have a different driver.  With the 1290
warm curve the green is held to 255 (no toner) until the last/darkest
quarter tone, where it then dives to the black corner (0,0).  Being able
to write curves this radical without glitches in the image is really
nice.


Paul
http://www.PaulRoark.com



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