Archived from groups: comp.periphs.printers (
More info?)
"shillyard" <you@somehost.somedomain> wrote in message
news
tzQd.19831$uc.970@trnddc05...
> In article <F9fQd.30607$wi2.22621@newssvr11.news.prodigy.com>,
> drc023@N^O+S~P^A^M.sbcglobal.net says...
>>
>>What Taliesyn and speakeasy have posted is exactly the same as what I've
>>observed. In my previous post I failed to mention the speed with which
>>grayscale under plain paper mode is printed compared to color mode. It's
>>noticeably faster due to the usage of the wider nozzle pattern for the
>>BCI-3eBK. The comment about using the BCI-6 black with plain paper at
>>highest resolution (quality) is also what I've noticed.
>>--
>>Ron Cohen
>>
>>"Taliesyn" <taliesyn4@netscape.net> wrote in message
>>news:37bv71F5ar6sbU1@individual.net...
>>> speakeasy wrote:
>>>> 3eBK is only used when you select plain paper. 3eBK usage varies
>>>> according
>>>> to whether grayscale or colour documents are printed. If you select
>>>> grayscale 3eBK is the only ink used however in colour documents 3eBK is
>>>> only used in areas of pure black. Any paper setting other than plain
>>>> paper
>>>> uses the smaller 6BK ink tank. I know because on my IP4000 3eBK ink
>>>> when
>>>> dry smears easily on touch and the only time this smearing stops is
>>>> when
>>>> the 6BK ink is used. I confirmed this by doing a nozzle check. Anyone
>>>> else getting this smearing on plain inkjet paper, i've tried two
>>>> different
>>>> types from staples, when using 3eBK ink and plain paper setting? If it
>>>> doesn't and you're from the UK tell me which paper you're using and
>>>> where
>>>> you got it, cheers!
>>>
>>>
>>> Looking under a very strong magnifying glass it appears I see colored
>>> dots at the edge of letters when printing text at maximum resolution
>>> black on plain paper on my iP5000. I wish I had a microscope. I know
>>> my older i860 blends colors for black in hi-res mode.
>>>
>>> Anyone out there can borrow their kids' electron beam microscope? ;-)
>>>
>>> -Taliesyn
>>
>>
>
> Here's what I see. From wetting the paper (and by amount of ink
> used) it appears that plain paper/high resolution/duplex uses the
> 3eBK along with some blue (and maybe other colors) in the text--normal
> mode seems waterproof, high resolution and some blue smears from
> the black text, choose photo paper and the black smears altogether.
>
> The annoying thing with this printer is that normal mode non-duplex
> is fast enough and has good enough quality, but in normal duplex
> mode text quality is insufficient. From canon's site this is
> apparently intentional--in duplex mode it makes the black lighter
> to avoid it rubbing off in the printer.
>
> I'm surprised the black is more likely to do that then the colored
> (which seems to remain the same quality in duplex).
>
> Is there any way to use auto duplex and get better black print? High
> quality is decent but is really slow.
>
> Sean
>
This is due to the fact that the 3eBk is Pigment based (for sharper text)
and unfortunately pigmented inks tend to smear when rubbed.
The colors are dye based so the longer they are permitted to set on the
paper, the more permanent they become (with limits of course).
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