HELP! Very Strange Black Lines

[consummate_fritterer]

I'm 100% sure the film was developed emulsion side up.

Okay, sorry... I'm at a loss.

[bob carnie]

the minus density on negative (dark on print) is caused by uneven development ... first 15- 20 seconds of any film development is critical , more agitation is required at this critical time.

[plaubel]

This may look like too old film.
What type is it?
I can't see the nodges...

[paulbarden]

A water presoak will probably help prevent these uneven development marks in the future.

[Jim Andrada]

I find it interesting that the lines are all parallel to the long side of the film and approximately the same distance from the edge (according to my eyeballs!). Why would uneven development work that way? I've seen problems like that caused by reflections from the edges of the film holders but that would be darker on the negs and lighter on the print

[jianglinxi]

This may look like too old film.
What type is it?
I can't see the nodges...

The film is Ilford Delta 100. It's fresh film not old stock.

[jianglinxi]

A water presoak will probably help prevent these uneven development marks in the future.

Thank you for your advise! I'm going to try next time.

[jianglinxi]

I find it interesting that the lines are all parallel to the long side of the film and approximately the same distance from the edge (according to my eyeballs!). Why would uneven development work that way? I've seen problems like that caused by reflections from the edges of the film holders but that would be darker on the negs and lighter on the print

My lines are dark not light. I'm wondering what happen to my negative. I had not issue to use tray processing before this summer. But both dark lines make me crazy.

[LabRat]

You did develop this film in an oversize tray, larger than 5X7???

I only get even 4X5 single sheet processing in an 8X10 tray... If there is not enough cross-flow during agitation, the by-products of the processing will "clump" in an area, and retard or advance (or both) in different areas... This does not mean you have to agitate the hell out of it, as the walls of the tray nearer the film can affect the even flow over it that displaces the by-products...

Steve K

[AtlantaTerry]

I disagree with all the suggestions offered so far. Why? Because the lines are even and repeated. No light leak or developing issue or age of the film would be as even or repeatable.

I have no idea what it is but I have to wonder if it has something with the two channels along the sides of every sheet film holder. As to HOW that might be possible, as I said I have no idea.