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Light tightness of super-8 cartridges


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#1 Heikki Repo

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Posted 01 September 2015 - 09:52 AM

Just a quick question: today I noticed that one Super-8 cartridge I had shot creaks a little when I push the sticker in the back, about in the middle vertically. The plastic bends a little when pushed on that spot. Now I wonder: how light tight are these cartridges? Anyone else noticed their cartridge not being 100% solid? Am I in for a nasty surprise of light leaks?


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#2 John Salim

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Posted 01 September 2015 - 10:46 AM

I've never known any Super 8 ( welded ) cartridge to be anything less than completely light tight.

Unless one of the welds comes apart - or it wasn't welded properly when packaged, you shouldn't have any problems.

 

..... they can creak a bit when stressed and pulled about, but you shouldn't do that anyway !

 

No idea how safe re-loadable carts are though.

 

 

John S :rolleyes:


Edited by John Salim, 01 September 2015 - 10:48 AM.

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#3 Andries Molenaar

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Posted 02 September 2015 - 02:33 AM

It is a non-existent problem. Factory cartridges are glued and the parts have rims which interlock and form a lighttrap. Unless the glue went out during production all will be well.


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#4 Heikki Repo

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Posted 02 September 2015 - 11:28 AM

Thanks guys!


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