"'the optimum pixel resolution [of the printed image] should ideally be the printer dpi divisible by a whole number. The following pixel resolutions should be used [for a 1440/2880 printer] : 144, 160, 180, 240, 288, 320, 360.'"
So what are the consequences of simply ignoring this? I have never applied this rule and the 8-1/2 x 11 inch (A4) prints I get off my Epson 870 are, to my eyes, excellent.
I generally try to ensure that I have near, at, or above 300 ppi when I print. I did, though, once make an 8-1/2 x 11 print at 180 ppi, and thought it was pretty good. Now I have Genuine Fractals, which I put to use for anything that will print at under 250 ppi.
Joe
