Digital BW, The Print

It appears that even in ABW the Epson driver is still using some of all
three colors CMY.  Paul's scan seems to show this too.

BTW, you can load any of the Epson drivers in Windows.  Just download the
driver, and install it.  Then pretend that one of your printers is the 4800
for instance, or I think you can assign it to the parallel port.  Anyway you
can do the tests you are doing without actually having the printer since
all the data is going to the file anyway.

Roy


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Bob Frost" <bob@f...> 
wrote:
> Paul,
> 
> My figures for the R2400 are the proportions of dots of each of the inks in 
> the Epson printer file (using print-to-file) and decoding it with Roy 
> Harrington's help.
> 
> If someone makes a 1" square patch of 240/240/240 on a 4800 using the Epson 
> print driver in AdvancedB&W mode, prints it to file, and emails me the file, 
> I will have a look at it. A full grayscale is no good, because the 
> interweaving makes it very difficult to analyse (part of the head is 
> printing one patch while the rest is printing another). Separate patches of 
> each value make life easier.
> 
> Looking again at the patches you scanned, it seems to me that the llk ink is 
> a continous cover of the paper - so no 'dots' visible - while the few color 
> dots that are easily visible are simply on top of the continous llk. At the 
> edge of the patches, the continous grey of the patches changes to the 
> lighter color of the paper.
> 
> Bob Frost.
> 
> ----- Original Message ----- 
> From: "Paul Roark" <paul.roark@v...>
> 
> At http://home1.gte.net/res09aij/4800_ABW_5-10_1600scan.jpg I've posted a
> scan of a 4800 5% and 10% test strip that was printed with the ABW mode.
> The 5%, which I think is 242 on the scale you're using, seems to be mostly
> color inks.