I was attempting to use the following guidehttp://www.avsforum.com/avs-vb/showthread.php?t=1134710
to calibrate my epson 8350 using Chromapure.
In the section about adjusting Color Gamut, he has the following tip found below. Are these % bars available in Chromapure? I can't seem to find them.
I've been using the Advance CMS and just calibrate x & y for each color at 75% until in lands on the 75% mark on the Gamut chart. However on a few colors like green, adjusting hue or sat moves both x & y.
I have found a very easy way to hit the correct color locations. This takes away the headache of trying to hit x, y locations (as shown above) and how you adjust saturation and hue to get there. See the red, green, and blue bars in the HCFR picture above? (three pictures back) In the picture, the bars show 98%, 100%, 100% to the left of the ftL and cd/m2 readings. These are the bars I'm talking about. Here are the target %'s for the red, green, and blue bar for each 75% color saturation location. (They are also listed in my Excel spreadsheet on the "Calibration Aid" tab as shown a couple of pictures back).
Red Bar Green Bar Blue Bar
Red Primary 378% 24% 24%
Green Primary 15% 133% 15%
Blue Primary 64% 64% 555%
Yellow Secondary 106% 106% 17%
Cyan Secondary 24% 120% 120%
Magenta Secondary 247% 41% 247%For example, lets say you want to calibrate red. To hit the correct saturation, all you have to do is increase or decrease the red saturation slider in the Epson RGBCMY menu until the red bar reads 378%, and the Green and Blue bar read 24%. If the green and blue bars are not equal, use hue to correct this. Hue is always used to balance colors. When calibrating blue for example, you want green and red to be equal. This creates the correct hue. When adjusting a secondary color, like yellow for example, you want an equal balance of green and red. (red and green will have a high %, while blue will be low.)
Keep in mind that you still need to set brightness (Y) for red, and all the colors The target value will be shown in the "Calibration Aid" spreadheet, or you can calculate it based on the 100% gray window. Remember, calibrate red, green, and blue before you calibrate the secondary colors.