Canon imagePROGRAF iPF6450 User Guide - Page 975

iPF6450 Frequently Asked Questions Question When using the Spectrophotometer Unit, which of white or black should be chosen in the White/Black Backing Plate? If I am using the Spectrophotometer Unit, can I measure the colors of any paper? Answer During normal usage, there is no restriction that you must always use white or you must always use black. • The White/Black Backing Plate complies with the measurement criteria defined in ISO 13655:2009. • When executing color calibration or color check using the Spectrophotometer Unit, we recommend that you select white. (See "Color Calibration Using the Spectrophotometer Unit (option).") →P.833 (See "Color Checks Using the Spectrophotometer Unit (option).") →P.835 • If you are using paper that light passes through easily, we recommend that you select white. • If a color is used for one paper type that is different from the color that was used the previous time, it may have an effect on the color measurement result. You might not be able to execute color measurement or might not be able to obtain the correct color measurement results when using the following paper. • Colored paper • Paper where the surface is not even • Paper where the color density is low when printing Troubleshooting Frequently Asked Questions 975 User's Guide