Quote:
Originally Posted by HarryT
Contrast, as quoted by eInk is not a subjective measure, dependent upon choice of fonts, etc, but a purely objective quantity measured by an instrument called a photometer, which measures the whiteness of the whites, and the blackness of the blacks.
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eInk definitions aside, the reality is often different from the measurements. It doesn't matter how white the background and how black the text is if the background also contains shadows in places. I seriously doubt Amazon measured the shadows. How could they, they seem to vary with each device. The shadows seem to be caused by the light layer which sits on top of the eInk. So my point is that a white background measurement and black text measurement taken without the light layer in place is not an accurate depiction of what we see.
I also believe that a one unit squared black spot on a 100 unit squared white background will seem to have less contrast than a 10 unit squared black spot on a 100 unit squared white background, if the whites and blacks in both scenarios are equal. The more black that appears on the white, the higher the contrast appears to our eyes. So thin text does not appear as contrasty as thicker text.