Peter , I don't think you'd get a moiré pattern with an Epson printer (and driver), no matter what the file resolution is, as the ink dot pattern is stochastic and not in a grid, whereas the pixels are in a grid....The ink pattern is very similar to the grain pattern on film, which is to say random. Harvey Ferdschneider partner, SKID Photography, NYC > If you print at 72 ppi then, yes, you will get a low res print even with > a high printer resolution. > > The main thrust of the thread concerns what happens as you increase the > resolution of the file and it gets comparable to that of the print > resolution. In principle you should see banding (or rather, moire > patterns) when the file resolution gets close to the printer resolution. > In practice I don't think you'll see it unless there is a regular > pattern in the file itself. For example, if you are printing a 700 > line-per-inch document at 720 dpi you might see banding as a 20 lpi > moire pattern. How prominent it would be depends on the angle of the > lines with respect to the vertical and horizontal in the print, and on > the dither pattern, etc. With photo prints the underlying photo image is > usually 'random' enough that you don't see the moire pattern, but if you > have a scan of a dot screen or if the image contains a number of lines > in a fixed direction then the pattern might show up. > > For myself, when I think of banding on my prints I am generally thinking > of irregularities in dot placement rather than of anything caused by > interference between printer res and image res. > > On Monday, June 3, 2002, at 04:38 PM, John M. Roper wrote: > > What am I missing here? I have been under the impression that printer > > resolution and file resolution are two completely different things; > > that printer resolution is a measure of the density at which it lays > > down dots of ink; and that, with Epson, any file information above > > above 360 ppi is discarded. In other words, if I have a 72 ppi, 8 x 10 > > file, and I print it at the highest Epson setting (in my case 1440 x > > 720), I would get a very faithfully reproduced low resolution print, > > jaggies and all. Have I been mistaken or am I misinterpreting what is > > being said in this thread? > > - > Turn off HTML mail features. Keep quoted material short. Use accurate > subject lines. http://www.leben.com/lists for list instructions. - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions.