Strange marks on scans..

[dave_osborne]

Recently I've started noticing some strange marks in my scan files. Mostly just

noticable on smoothly textured parts of the image at 100% it looks like

clustered strips of dirty marks which run vertically from top to bottom of the

frame (looking at the from in landsape orientation) but not always exactly

vertically, sometime on a slight diagonal.

I've attached a 100% crop of one such area.

 

Anyone seen it before? Do you think it is my scanner.. perhaps dirty? or

something up with the development of the slides? This has occured on many

different rolls of e6 but I think all have been developed in the same place.

 

This is mostly with Astia 100F and Nikon Coolscan V.

 

Thanks for any suggestions.

Dave.<div></div>

[dave_osborne]

BTW I scan with ICE on.

[walterh]

"BTW I scan with ICE on."

 

 

Dave you know the comment: Did you try the same area with ICE off?

Its hard to tell but it might be a faint static discharge when the film was handled. Looks not really typical but might be a possibility.

 

Is it in all areas? Light and darker?

[dave_osborne]

If I try with ICE off the same pattern is there only stronger.

 

It's not present in all frames, and not throughout the entire frame when it does occur.. it's in strips. I scanned the same frame twice with Nikon Scan & Vuescan without cleaning and the dirty marks matched up in both. So I'd *think* that means it's on the slide - but I don't have a powerful enough loupe to check.

[jtk]

Looks like chemical stain...alcohol formation in poorly maintained color developer can do that kind of thing.