On Aug 18, 2006, at 9:12 AM, Douglas Newman wrote: > --- Juey Chong Ong <[EMAIL PROTECTED]> wrote: > << The newer R series clogs less than the older > models. So they've either improved the ink formulation > and/or head, or older printers just tend to clog more > often. >> > > The newer printers have entirely different ink. > > For one thing, some the latest ones all use > pigment-based ink while most of the older models (e.g. > the 1280) used dye-based inks. > > In theory I would think the pigment-based ink should > clog more easily, but perhaps it's the opposite...
Particles of Epson's pigment-based inks are larger than the particles of dye-based inks and have an encapsulating layer of slippery stuff around each of them. This means that the nozzle passages are larger to pass the same volume of ink per squirt, which reduces clogging issues. Godfrey -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
