Digital BW, The Print

> But Austin,
> I don't understand why your test is any more valid than the
> aforementioned ones? Can you please explain?
>
> Harvey Ferdschneider
> partner, SKID Photography

Which tests?  Are you talking about my conclusion to use Piezo, or the
proposed tests to determine if Piezo prints with pure black ink?

If you are talking about my tests between MIS and Piezo, they were done
using many different REAL images (not pure black test patterns that are not
indicative of the performance of a grayscale printing system) and put on a
board, with appropriate lighting and viewed for weeks.

It, of course, is entirely subjective as to which tones or images one
"likes" better. There was tonal detail in the Piezo prints that I felt was
rendered "better" (had visibly more tonal and contrast detail) than with the
Epson driver and quad inks.

If you are talking about the test to determine if Piezo prints with pure
black or not, that is a relatively simple test, and is entirely different
than an image quality test.  Having densitometer readings and being able to
look at the images with a 90x microscope should reveal what is going on.
This is NOT a grayscale image quality test, but an ink test, and using a
solid test pattern of pure black is the only way to do this.  Again, this is
NOT an image quality test, like the tests that were done using line patterns
were, entirely different testing.

Which "tests" were you referring to?