Digital BW, The Print

John,

MIS appears to think that Eboni in a cart can be put into a printer without
flushing.  See http://www.inksupply.com/index.cfm?source=html/whatsnew.html

Presumably, there is not enough ink left in the head to cause a problem.

Using OEM Epson ink as a cleaning fluid for an Eboni system does seem like
it might not be the best solution.  However, I really don't.

Paul
http://www.PaulRoark.com
_____________________________________

-----Original Message-----
From: John/Julie Gittins [mailto:jgittins2@...]
Sent: Monday, April 14, 2003 7:55 PM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: [Digital BW] RE: UltraTones - what to do?


On 04/14/2003, Paul Roark wrote:

>What MIS has found is that if Eboni black (a very "high load" pigment ink)
>is mixed with dye ink, the viscosity goes way up -- it will not print.  I
>think if there was some Gen 4 Enhanced black (25% dye) in a CIS/CFS before
>the Eboni was added, the system would clog.
>
>So, when switching to Ultra Tone B&W ink with Eboni black, one must use a
>new CIS/CFS cartridge.  In large format printers that have had any dye in
>the black, the system must be flushed.

Paul,

That mixing Eboni-K with some dye ink can likely result in clogs
seems a very important finding. Do you feel MIS has checked out
this connection sufficiently so that we can reliably expect large
viscosty increases whenever these 2 kinds of ink are mixed? For
instance, if someone using Gen4 enhanced-K in pre-filled carts
switched over to Eboni in pre-filled carts (just as they would
have when starting up with MIS FS-K after having used EPS OEM-K
in their printer), would the extra-viscosity effect be likely to
occur?

If the answer is "Yes" (and, hopefully, it isn't), then the
clog-clearing trick of sticking in EPS OEM dye carts might not work
with Eboni; it might, indeed, make things worse. (Would running
purge cycles with cleaning carts, then, be the only way to keep
Eboni-K and dyes separate?)

If you think the switch-over from Gen4 enh-K to Eboni could be
done without risk of clogging when only pre-filled carts (no CIS/CFS)
are involved, would it be because the amount of Gen4 dye left in
the path from cart to printhead is just not large enough to trigger
the super-viscosity effect?

I look forward to getting your take on such questions.

Regards,
John




[Non-text portions of this message have been removed]



Please visit the Group Homepage to check the Files, Bookmarks, Polls and
other resources as they are often being updated. The page is at:

http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint

If you wish to receive no emails or just a daily digest, or you wish to
unsubscribe, please edit your Membership preferences by visiting this same
page.

Please follow these basic guidelines:
- Include your full name with your message.
- Include the address of your website, if you have one.
- As threads develop, trim off excess portions of earlier messages to keep
them short.
- As the topic of a thread changes remember to change the subject header.
- Good manners are required at all time. No personal attacks or
"flames."
- Complete your Yahoo profile.
- Before posting a question, search the message archives and the various
resources on the homepage.




Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/