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Copy Speed(4.62)
The MX850 performed well on the copy speed test. It was able to make text copies at a rate of .4 pages per minute and graphic pages at a rate of .8 pages per minute. Although not a great score, the Canon MX850 is able to stay competitive with other printers in its class. The printer had a tendency to stop in the middle of printing the copy and stall, but when it started back up again, it boosted out the pages.
Copy Color Quality (8.85)
We test the quality of the copies that printers like the MX850 make by copying a Gretag Macbeth color chart and then testing the accuracy of the scan. The Canon MX850’s color error for our Colorcheck copy quality test was very good, achieving a mean color error of 5.65. Using Gretag Macbeth’s 24-square Colorchecker chart, which contains commonly photographed colors, skin tones, and gray tones, the chart is scanned into using the Epson Perfection V700 scanner, a calibrated lab scanner. Running this image through Imatest’s Colorcheck program yields output that shows the average difference between the printer’s interpreted color values and the Colorchecker chart’s ideal color values. The MX850 matched foliage and greens very well but didn’t do a very good job at matching shades of red, magenta and yellows.
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