Digital BW, The Print

On 10/17/01 1:26 PM, "Paul Roark" <paul.roark@...> wrote:

> I'm told that the big-format HP and some other printers use solid colorant
> pigments.  Apparently they have very long lives (resistance to fading,
> etc.), but rather low gamut.  For the desktop, I'm also told they had not
> yet been ground finely enough to avoid clogs on our Epson printers.  If
> someone has succeeded, this could be a true advance.


Apparently they had problems initially with clogging but have a 6 nm grind
now...wow jet grinding has come a long way since I was in the business.
Apparently they have multiple users running desktop printers with a CIS.

> What black do they use?  Do they have a pure colorant that is blacker than
> carbon (more like dark brown, from what I can see) and just as fade
> resistant?  If so, that would be of real interest as a quad feedstock.

 Don't know...but I would guess that it is still carbon black...however, the
grind is critical.  If you can get a really fine grind...the particles will
pack tighter and give you a look more like dye.  Large particles have more
space that isn't black (particles on average are spherical).

But we'll see.  Very interesting.

Just want to say I really appreciate all your hard work to move this inkjet
technology forward.

Showed your "Tree" image to Robert Rex yesterday (he hadn't seen the first
print exchange)...and it got an instant "wow".

Robert


----------------------
Robert Morrison
rmorrison@...

310-397-2704

4131 Bledsoe Ave.
Los Angeles, CA 90066