Digital BW, The Print

You only need to measure density if you want to create new curves or
significantly modify existing curves and want to linearize them. You can
measure ink density with a densitometer or a scanner. The scanner would be
less accurate, but might suit your needs quite well. You would need a
reflection scanner of course, as opposed to a film scanner.

> I'm brand new to printing and QTR, which I want to use to print sepia
> tones and BO method with my 2100-Epson inks.

You don't need QTR to do BO printing. You would for variable toned printing,
though. There are quite a few UC curves available for the 21/2200 printer
for a variety of papers. You might want to try these with the Epson black
first to get a benchmark for comparing with the Eboni. 

> 
> I have just downloaded QTR and I'm going through the user guide. The
> section on ink density calibration indicates that I need a densitomer.
> 
> What the hell is it? Is it necessary? Is it going to cost alot?

As it's name suggests, a densitometer measures ink density after printing.
You can get a used xrite 810 for around $200(US) - often on ebay. As I
stated above, a scanner can do quite nicely, if you have one.

> 
> Different question (sorry)..if I buy MIS eboni black cartridge, can I
> continue using the other Epson inks and only substitute the black or
> will the printer not function with the 2 different ink types?
> 

I haven't tried printing with Eboni and UC colours. It would work as far as
the printer is concerned. The question is whether the existing curves that
use Epson K would loose their effectiveness. Someone else may have tried
this and may respond. Using the Eboni would likely throw off the profiles
you use for colour printing of course.

> Thanks in advance.
> 
Hope this helps

Tom Moore