I have an image of a series of stepped blocks of grey tones going from fully black (100%) to white (0%). This is a .psd file that I have opened in Affinity. I decided I would measure the tones for accuracy before printing . Using the eye dropper tool and the greyscale colour model in the info window I started with the 0% tone (white). It reads as 0% in the info window so it is white.I measuered the 5% grey tone it reads as 5% ,so it is correct. I measure the 10% block of grey tone it measures as 8% ,20% measures as 17% ,30% grey is 25% ,40% block as 33% and so on and so forth up to the 100% grey tone (black).I have attached the image/file I am measuring.I would love to know what the issue is here. I have incidentally opened this image some years ago in photoshop and all grey tones measured correctly.Any help would be appreciated.Nick
half letter 3-step tab test.psd