[JimStar]

A little addition-clarification:
Don't think that "the more the angle of view is the darker is Mirasol, and in direct anfas view it is brighter", the darkness is not dependent from angle of view, it is dependent from angle to light source. And it is just occasionally that the angle to light source on these photos was almost direct in anfas. Where the light source in another place - it can be that in the direct anfas Mirasol will be VERY dark and in acute angle it will be more bright. On one of these photos you can see that Mirasol is bright enough in the same "more acute" angle in which it is dark on another photo (another angle to light source).
So, in some circumstances you will need to read from acute angle to get Mirasol more bright, contrast and readable...
And eInk is equally bright in all these angles...