HELP! Very Strange Black Lines

[plaubel]

Even and repeated lines may come from this ugly "canyons" on the bottom of usual trays.
The developer gets another concentration and less movement in this canyons.

I now would expose one not so dark film with even light; then I probably could see what happend to my film.

Ritchie

[Ken Lee]

There are different kinds of tray development, some better than others.

It's a good idea to pick up the film, turn it upside-down, return it to the developer and repeat this process throughout development, stop bath and fixer.

Make sure the emulsion faces up sometimes, down other times.

[jianglinxi]

There are different kinds of tray development, some better than others.

It's a good idea to pick up the film, turn it upside-down, return it to the developer and repeat this process throughout development, stop bath and fixer.

Make sure the emulsion faces up sometimes, down other times.

Thank you for your advises! I tried 5 negatives last weekend! No issues any more!

[jianglinxi]

Thank everyone for help!!