In my experience the pan f+ top and bottom markings are always very faint, I don't know why ilford does that, and I don't like it, but I've never seen defined markings like you would with Kodak films. It's the one thing about ilford I don't like, I'm sure there's a reason they do it, maybe it's an exposure thing where it's supposed to give you a certain color grey when scanned/printed but it just looks wimpy and difficult to see/read.
Anyway the others said it best, if the markings are all the same density, but the film is not, it's your exposure. If the markings change with the areas where the film is also different, then it's the development.
The Noteworthy Ones - Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1 / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic
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