eye one iO optimal patch size

I also think that the numbers are good, and reducing the number of patches will not make a better profile (for single A4 sheet).

I also can’t understand why if you measure with a ruler by hand the aperture of the measurement device 1i1Pro touches the paper, but when the device is moved by i1 iO then the aperture is about 1.5mm above the paper.

If the aperture is not touching the paper shouldn’t this make worse readings then measuring by hand? Numbers say it doesn’t. So why then have +2mm on measurement device aperture as a ISO 5-4 standard?

Furthermore I don’t understand why the standard test charts that are made for i1Io by Xrite like:

TC9.18 RGB
IT8.7-3 CMYK

They all use 6x7mm patches, why not 8.4x8.4mm like ISO 5-4 standard specifies for specific i1Pro device with aperture of 4.3mm?

Isn’t a target that is held a “standard” should be quality oriented ?