So maybe you got 2 forms of artefacts, from same cause. At one location showing up as scratch (due to the silver-containing layer completely taken off, at other locations not taken off at all or only partially, with the resting silver-containing layer having been compressed, resulting in pressure-fogging).
Are both kinds of artefacts located in the same line parallel to the edges, or are both artefacts showing up each in a line of their own?
Are both kinds of artefacts located in the same line parallel to the edges, or are both artefacts showing up each in a line of their own?