Re: HIE in Bronica 135W film Backs

[George L Smyth <glsmyth@xxxxxxxxxxxxxxxxx>]

On Thu, 22 Jul 1999, Otto Giesenfeld wrote:

> Is it the felt that leaks light into HIE cartridges? If so, it would seem
> easy for Kodak to replace it with some more effective kind of felt. I kind
> of thought that, instead, it was the lack of anti-halation layer in the
> film that was the culprit. (Making the film act as an optical fibre and
> lead light into the cartridge.) Is there a well-established knowledge
> (outside Kodak) on why HIE has to be loaded in darkness?

I asked Kodak's head IR guy about this when preparing my article on EIR,
and was told that the felt is not IR opaque, AND the
film does not have an anti-halation layer.  This is why HIE needs to be
loaded in the dark.

george

---
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