Washington DD which normally has high humidity.
OK Was that the only film and only winter and was this in SoCal? I was hoping to at least narrow down a range of the actual conditions in terms of humidity and temp that may cause this issue
pentaxuser
I buy leather moccasins from a place in Canada. Brown Bear company, they sell slippers with copper rivets to ground wearers. Probably not real popular with electricians.
But would be perfect for us hobbyists who tinker with electronics. Brown Bear also sells an earthing headband, so the electricity will flow through my brain before it leaves. That'll help.
Really. Their web page (link) says this electric headband can "reduce stress, relieve muscle and arthritis pain, headache symptoms, alleviate menstrual symptoms...".
A bit off topic but connect to teh post: How can I post-edit the message? I do not see any button, option for that.
Hi,Out of curiosity, how many frames out if the roll were affected by the static, and where were they in the roll (eg grouped near one end / at intervals throughout the film)? I’m just wondering to what extent the static penetrates the layers of film.
Out of curiosity, how many frames out if the roll were affected by the static, and where were they in the roll (eg grouped near one end / at intervals throughout the film)? I’m just wondering to what extent the static penetrates the layers of film.
Hi,
Frames: 3, 4, 5, 17, 22, 24, 26, 29, 36, 37,
Behind my question was a vague idea that we might be able to guess whether the discharge arose as a result of a single event, like pulling tape; or repeated events, like when running the film too quickly, eg through a light trap. Sadly, I’m none the wiser.The frame locations have nothing to do with static electricity. Static electric discharge is related to very low humidity and rapid film advancement. Pull Scotch tape quickly off the roll and it will try to adhere to anything in the area, pull the tape slowly and the tape will not be attracted to nearby objects.
Behind my question was a vague idea that we might be able to guess whether the discharge arose as a result of a single event, like pulling tape; or repeated events, like when running the film too quickly, eg through a light trap. Sadly, I’m none the wiser.
Static discharge goes from one layer of film to another layer of film that is being separated from the first.
Do you happen to know how many layers it can penetrate?
The other related thread shows almost identical marks, so unless the same static discharge was in both cameras, improbable at best, then again the manufacturer is responsible.
The same issue has popped up at least 3 times over the past few months AFAIK, in all cases with within-date Fomapan film. I think odds are it's really confectioning-related.
Yesterday I processed a Fomapan 100 135 film, factory load, not bulk loaded. There's the, presumably lot code 023215-07 and the expiration date is 9-2025. There are static discharge marks in at least 10 frames. The clearer example can be seen on a blank frame below (with greatly exaggerated contrast):
View attachment 350824
And yes, the thin line on the left (running lengthwise on the film) is there on the film and not a scanning artefact. It's a scratch that appears in many frames. I seriously doubt it's camera related. The rest is simply dust. It's an interesting and very affordable film, but sadly it's not worth much if it's plagued with defects like these...
That is what I experienced on very dry windy days with static discharge.
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