SleeperMan said:
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