When starting a measurement on a media wedge such as the IdeaAlliance wedge, my software (ORIS Certified proof) asks to place the EyeOne on a white reference. I always place it on the one that’s supplied with the EyeOne - the plastic one with the white reference that’s got a slot designed for the device.
Is this the correct method? I can’t imagine any other way because trying to set the device on blank paper would let ambient light into the reading. Or not. I’m not sure.