Canon IP4000 query

Archived from groups: rec.photo.digital (More info?)

MB_ wrote:
> I have a new Canon printer as mentioned above and we like the prints.
>
> Two questions:
>
> 1) About how many 4X6 photos can one get before needing a new cartridge(s)?
> So far, I have printed about 90 such pictures and from what I can tell, the
> cartridges APPEAR to be about 60% full. Is that about right? This leads to
> my second question:
>
> 2) I checked the cartridges by taking them out and kind of trying to eyeball
> them. It is still hard to tell how much ink is left. But, am I messing up
> any sensors by checking the cartridges that way?? I assume from what I've
> read that when the ink gets very low the printer will know it via some
> optical method (bottom of cartridge will get clearer) so my checking it
> shouldn't mess that up. Is that correct? If not, how else can I check it?

Once the "liquid" side of the tank is empty, an optical sensor under it
will trigger the "low ink" warning. At that point, the sponge side of
the tank still holds enough ink for probably a couple dozen prints,
giving you time to pick up a new one. Taking the tanks out to check
regularly shouldn't hurt anything, although you stand a chance of
leaking ink onto your desk or clothes...