Archived from groups: comp.periphs.printers (
More info?)
Mo wrote:
> "SleeperMan" <SleeperMan@too.sleepy> wrote in message
> news:<2q5cd.4356$F6.1213551@news.siol.net>...
>>
>> With my i550 i did print in duplex (manual, sure) several times and
>> i never had this issue of ink coming through. I guess that quality
>> of plain paper also counts.
>
> Actually what I meant was not that the ink would bleed "through" the
> paper. What I meant was that since the ink is absorbed into the paper
> it is "closer" to the backside surface making it easier to see the
> black print.
>
> For example, a standard sheet of 20lb paper is about .003 inch thick.
> If the ink is absorbed into the paper 1/3 of the thickness, then there
> is only .002 inch of paper to obscure the printing on the front side.
> With a laser printer, the toner is on the surface of the paper so the
> full .003 inch of paper serves to obscure the printing on the front
> side.
>
> I have both inkjet and a laser printer and the difference in being
> able to see the front ink from the back side is substantial.
>
> But in rethinking my statement, it may not apply as much to the ip4000
> or ip5000 printers that have 2 cartridges of black ink. One cartridge
> has black "pigment" ink so the pigment ink would tend to sit on the
> surface of the paper with less absorbtion into the paper. It would
> apply to the other ipxxxx printers that do not have the black pigment
> ink cartridge.
>
> Mo
You have the point here. I never even looked towards the light to see the
difference, though.
I'll do that once.
ip4000 does have both blacks, but if i understood correct, pigmented one is
used for text, while dye one is used only for photos...or is it?