I am getting thin, sharp black lines and also, somewhat wider, "out of focus" gr ey lines through some of my my B&W negatives. What causes this and how can one avoid it?
FYI: I tray develop my Ilford 4x5 sheet film. Does the above described problem sound familiar to anyone else? Please help. Andre
PS For what it's worth, I see the occaisional white scrath line, and the cause for this is obvious: one sheet film scratched another in the trays. And also, I sometimes see very similar defects in my B&W prints.
Possible causes: static electricity?, emulsion cracking due to differing temper atures? (admitedly, my final washes for negs and prints are not at same temp as the chemistries preceeding- gotta correct that), scratching emulsion prior to ex posure/processing?, or something else?
Thanks again for your help.
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