Re: maco ir

[phillip geller <filje@xxxxxxxxxxx>]

Eckhard Stephan wrote:

> 
> I agree. I am always hesitant to blame other people for my problems, but
> my experience with the film does'nt allow another conclusion, either.
> Meanwhile I am convinced, that the plastic canister has nothing to do
> with the fog on MACO IR 820c. I was mislead by my own experiment: As I
> wrote in an earlier message, I put a piece of HIE in a MACO canister.
> Then I exposed the container to light. When I developed the film, it was
> black. Of course, this means that the MACO canister is not IR-proof
> regarding the wavelenghts HIE is sensitive to. However, it does NOT
> mean, that the canister is'nt safe for the MACO film it was designed
> for. I recently repeated my experiment with a piece of MACO film - and -
> surprise ! - the MACO film was not exposed at all. This means, that the
> MACO plastic canisters should be okay for the MACO film...
> I handled the film the same way, that is described in the above
> quotation from P. Gellner's message. Nevertheless I still got a fogging
> problem: On all 3 MACO IR films that I shot so far, the leader was
> heavily exposed. I also got fog on the first 10-14 frames. The fog is
> especially dense near the sprocket holes. On the first 4-8 frames, the
> picture itself is also affected.
> Yesterday I took a fresh roll of MACO IR from a container, which had
> never seen any light at all (at least at my home). I cut off a few
> inches of film from the beginning and developed them. I found the same
> kind of fogging I had also seen on the previous rolls.
> IMO, there is only one possible explanation for this, if you don't
> believe in paranormal phenomena ;-) : The tin cassettes of the film were
> already exposed to light by the MACO people. We got "pre-fogged"
> films...
> 
Thanks for the testing, you have saved me an hour of my time.
I had thought of another possibility, that is , that the film
was examined by customs when it was imported, but now I think that
is unlikely. 

another thing that that I found... one and only one 
of the film canister caps leaked IR. 

Anyone have a theory about why there is more fogging at the
edges?

PHIL

*
****
*******
******************************************************
*  To remove yourself from this list, send:          *
*         UNSUBSCRIBE INFRARED                       *
*       to                                           *
*         MAJORDOMO@xxxxx                            *
*----------------------------------------------------*
*   For the IR-FAQ, IR-Gallery and heaps of links:   *
*  http://www.a1.nl/phomepag/markerink/mainpage.htm  *
******************************************************