No one ever told me ...

[defconfunk]

.. that tape glows when you pull it off the reel.

I had just finished rolling a 50' length of film from a 400' roll into my bulk loader. As I was finishing up I pulled a length of tape off the roll to secure the 400' can. And in the darkness I saw it glow. I tested it with a roll of duct tape I had with me, and it too glowed as I peeled tape off.

So there you go, in the dark room, make sure your tape is precut, not because it is easier, but because it glows!

I never saw that in any of the 'how to develop your own film' pages.

 

[ruby.monkey]

Don't chew boiled sweets in the darkroom. 😉

 

[Photo_Smith]

You see this when pulling the backing tape from a 120 film, don't worry I've seen it countless thousands of times–never seen any evidence of fogging.

 

[timor]

You guys live in some very dry country.

 

[Sparrow]

My phone glows in the dark when someone rings me while I'm in the darkroom ... I thought I'd done em all, but no there's always new clauses being added to sod's law

 

[Ezzie]

"Sod's law" doesn't translate well to Norwegian. We call it Murphy's law. There is a rumour that Murphy was an optimist.

 

[Sparrow]

Sod's law is any action or reaction that calls for the exclamation bugger me! but in a more pessimistic way 🙂

 

[defconfunk]

This thread has been very enlightening. You really do learn something new everyday!

I'm most glad to hear that it isn't bright enough to fog the film.

 

[Ezzie]

Sod's law is any action or reaction that calls for the exclamation bugger me! but in a more pessimistic way 🙂

Oh, I understand already. Just saying that ironically, there is always a worse outcome.

The three levels of sod`s (Murphy`s) law as I was taught.

1. If it can go wrong, it will.
2. If it can't go wrong, it (still) will go wrong.
3. If at first it doesn't go wrong, future events will prove that it would have been better if it had.

 

[Roger Hicks]

Or:

Sod's Law states the opposite

or:

Sod's Laws states that anything that can go wrong, will, and anything that can't, is waiting for an opportunity.

But I'm surprised that triboluminescence isn't familiar to more people.

Cheers,

R.

 

[nikon_sam]

You see this when pulling the backing tape from a 120 film, don't worry I've seen it countless thousands of times–never seen any evidence of fogging.

I've seen it with Kodak 120 film not sure it happens with the tape Fuji uses...
If you pull the tape off slowly it won't give off this Glow...

I too was shock the first time I saw that...😱

 

[znapper]

Yeah, me too, I was like "wtf is this??", is my film ruined now??

And one time, while fiddling with a roll of Neopan 1600, I had forgotten to take off my wrist watch, the dials glowed like crazy. (I was rather quick getting that one off and face down on the floor).

But it differs from the film type as well, so far, the "worst" one I've seen, is Fomapan 100.

No I'll effects though, probably too little energy.

 

[nikon_sam]

Yeah, me too, I was like "wtf is this??", is my film ruined now??

And one time, while fiddling with a roll of Neopan 1600, I had forgotten to take off my wrist watch, the dials glowed like crazy. (I was rather quick getting that one off and face down on the floor).

But it differs from the film type as well, so far, the "worst" one I've seen, is Fomapan 100.

No I'll effects though, probably too little energy.

I remove my watch when loading film in a changing bag...also don't take your phone in the darkroom either...:bang:

 

[Trius]

As someone who has rolled their own (film) for many years, I've known this for many years and figured everyone knew it. But now I know the name for it. 😀

 

[Eugen Mezei]

The 90 m roll of Polypan doesn't fit into any loader, so I had to take the entire roll out of the box in the dark and roll by hand into canisters. Before that I glued sniplets of tape to the tiles in the darkroom (aka bathroom).
Now do I guard in my refrigerator dozens of canisters with preexposed Polypan? The roll was completly unprotected when I took the first tape from the tile, ofcourse it flashed.

 

[sevo]

Now do I guard in my refrigerator dozens of canisters with preexposed Polypan? The roll was completly unprotected when I took the first tape from the tile, ofcourse it flashed.

Ignore it - that tiny bit of triboluminescent light from arms length is way below the fogging threshold. The light from the tapes is weak enough that Kodak consider it safe to use the same tape (which is a fair bit brighter than common household tape) all across the product line, even on their fastest films.