The sales person told me this.
ip3000 uses more ink than ip4000.
THe reason is that it has to combine the 3 colours to product black.
So for a black colour, all three ink are used. But for ip4000, there
is a dedicated black colour.
so for black colour, ip3000 uses 2 times more ink than ip4000.
sounds logical. any truths ?
Yes and no.
The iP3000 and iP4000 both contain a BCI-3eBk pigmented black tank which is
designed for use when printing black text. They both use 2 - 5 picoliter
droplets and both use same 'basic' driver functions.
Where the difference comes in is that the iP4000 also incorporates a BCI-6Bk
ink tank which is used for photo printing, while its BCI-3eBk is used for
black text.
So while the iP3000 'may' use additional color inks to achieve a composite
black within a photo, the iP4000 would instead use its BCI-6Bk for the same
area on that same photo. So it is not that the iP3000 uses 'more' ink, just
different inks to achieve the same (or similar) result.
Also one needs to keep in mind that also by design, these printers will BOTH
use the BCI-3 for photo black IF the driver is set to 'Plain Paper'. This of
course is not recommended as the pigmented black tends to have a 'blotchy'
look if you have a large area of a dark color in the image.