I must take issue here - it is arithmetic! If you use a print resolution of 1440dpi (dots per inch) in order to achieve 256 levels of colour you need a cell size of 16x16 dots. There are 90 of these to every inch. Good printing practice says the original file should be twice this to ensure that you achieve the best sampling (if the file were 90ppi you might sample one pixel twice and then miss the next one...). Double 90 give you the 180ppi that Epson told you. Particularly with the diffusion (stochastic screening) dithering inkjets all use plus, they say, variable drop size you get at least the appearance of a greater resolution.
If you really need to know the real life resolution of your printer why not print a lens testing chart? BTW this is the sort of nonsense you get from... Paul Lawrence > -----Original Message----- > dick.roadnight(at)btopenworld.com > > "There is no need to set the resolution beyond 180dpi for any of the > current > Epson printers (2100 / 7600 / 9600)" > > This is only the case if you can ensure that no-one gets within 10feet > of the print. > > This is the sort of nonsense you get from commercial processors who want > to charge you �30 for a print that will cost them �3, but cannot be > bothered to spend a few more seconds handling the larger file. > > This is the sort of nonsense you get from "pros" who use low-res > cameras. > > > =============================================================== > GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for > SALE --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.458 / Virus Database: 257 - Release Date: 24/02/2003 =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
