Re: MIS Inks

["Dave Emmerson" <dave@xitroneurope.com>]

If you're unfortunate enough to have to use 8cc carts, then you're going to
have considerably more wastage than I get with the big carts I use in the
5000 (which are probably in the region of 80-100cc for a the Y and K carts).
In particular, your small multi-ink carts are stuffed with a rigid foam
material. This prevents the inks from slopping across the vent holes in the
tops of the carts and contaminating each other, and from frothing up when
shaken from side to side by the transport mechanism. When those carts are
'empty' a fair amount of your 8 ccs is unused. It simply doesn't scale from
8 to 100cc in the way that you imply.
Also, these variable-droplet printers only use 4 pl spots in the highlights,
the shadow areas are inked at closer to 20pl. In practice, I've never kept
track of the number of prints I get from any given cart, but the last batch
of images I ran consumed almost 2 reams of A4 (95% of paper imaged, mostly
on generic inkjet paper). They weren't new carts when I started, and I'm
still using the same carts for printing the occasional doc, so 240 or even
500 is wide of the mark, because the C/Lc carts are lower capacity.
This 5000 also tends to show banding if left idle for a while (a week or
more). It takes around a dozen dense prints to get all the nozzles firing
cleanly on those occasions. If you run the test pattern, you can clearly see
that some jets are firing 'high' and some 'low', giving overlapped lines and
uninked areas alongside them. Some even twist. Full marks to whoever
invented the laser nozzle check Epson use on the 10000!
D.

Too bad the theory is so remote from practice. If I get about 15/A4 with one
cartridge which is about 8cc. Say 16 prints at 8cc or 2 prints/cc then 4 oz
at 118 cc aprox. yields almost 240 prints. Efficiency of 10% compared to
your calculation. Where does 90% of the ink go? It's worse, they claim 4
picoL. dots, that's 2.5 x as bad.

Lets see, for one/each color;
If I remember correctly pico is 10*-12 so
10pL = 10*-11 Liter or 10*-8 cc that is per dot

at 720 dpi that is 518400 dots/square inch

Most conventional print on an A4 or letter size sheet is 8x10 inches so we
have 80 square inches per sheet thus 80 x 518400 = 41472000 dots / sheet at
10*-8 cc/dot is 0.41472000 cc / sheet or almost 0.5 cc / sheet then 4 oz. at
almost 120 cc would yield about 240 prints. This of course is at full or
100% coverage so we might expect, depending on the density and coverage of
the image, perhaps close to 500 8x10 prints on A4, perhaps only 400.

At $ 16 / 4 oz. (some ink cost at some places) this is  $ 4 for 100 8 x 10"
prints or 4 ct / 8 x 10" ( or 16 ct. / 8 x 10 for 4 color prints, add 4 ct./
sheet in paper cost makes for 20 ct./ print and that is cheaper than the
corner lab).
This as a ball park fig. only of course and before the printer started
adorning the prints with light, dark or multicolor stripes, bands, etc. etc.
etc.

regards,

Robert

> > Anyone know how many A4 colour prints at 1440 dpi can I
>expect out of a 4oz bottle of MIS CFS dye based inks on
>Epson glossy.
>
>It depends upon the % coverage and media absorbancy, of course.
>
>For a rough and ready rule of thumb, calculate 10 picolitres per dot at
>720dpi for 100% coverage.
>If 4oz is approx 100ml (allowing the remainder for head-cleaning wastage),
>you'll get:
>0.1 / 0.00000000001 dots out of the bottle (100000000000)
>Divide that by (720 x 720) for the area in sq in = 192901 = 2400 sheets of
>A4/Letter
>
>..in theory
>
>D.
>
>
>
>-
>Turn off HTML mail features. Keep quoted material short. Use accurate
>subject lines. http://www.leben.com/lists for list instructions.


--
-
Turn off HTML mail features. Keep quoted material short. Use accurate
subject lines. http://www.leben.com/lists for list instructions.


-
Turn off HTML mail features. Keep quoted material short. Use accurate
subject lines. http://www.leben.com/lists for list instructions.