I must report a significant error I made in the study I reported below. As I described, I removed all 7 cartridges, determined their total weight, reinstalled them, and made a print. I then removed them again and redetermined their total weight.
I thought about it again this weekend and came to the realization that there was a major flaw in my reasoning. When I reinstalled the 7 cartridges prior to making the test print, the printer used some of the ink to flush the lines--so not all of the ink that was used was consumed in making the print. To determine the magnitude of this error, I did the following. I determined the total weight all 7 cartridges and reinstalled them in the printer. I printed just a few text characters (negligable ink usage) to be sure the printer was again fully functional. I removed the cartridges again and reweighed them. I found the ink usage to be 1.9 g. Therefore, of the 3.7 g of ink that I erroneously reported was used to make the test print, actually only about 1.8 g was used. This would make the ink cost for my 12 x 12 in print about $ 1.49 (US) rather than $ 3.11. I apologize to all for this error. P. Blume -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Philip Blume Sent: Friday, November 12, 2004 12:32 PM To: [EMAIL PROTECTED] Subject: [PRODIG] Cost of Epson 2200 ink After getting my Epson 2200 I determined the approximate cost of ink. Using a balance with a precision of 0.1 gram, I weighed each of six or so new ink cartridges before installing them in the printer and again when they were exhausted. I got values of about 10 to 13 grams of usable ink per cartridge. A figure of 12 grams per cartridge (regardless of color) is probably close. I then removed all seven cartridges and measured their total weight. After reinstalling them, I printed a 12x12 image on Epson matte paper using the highest quality settings. I removed and weighed the set of cartridges again and found I had used a total of 3.7 grams of ink for 144 square inches. Therefore my rough estimate is 0.026 g ink per square inch. I pay approximately $ 9.95 (US) per cartridge plus a little more for shipping. That comes to roughly $ 0.83 per gram of ink. A 12x12 in print therefore comes to about $ 3.10 for ink alone. Philip Blume 13401 Circulo Largo NE Albuqueruqe, NM 87112, U.S.A. 505-294-1976 =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
