Re: Light Piping AND IR transmissive Felts cause fogging.

["Jaap Los" <imagefotografie@xxxxxx>]

Rolland,
Yes you are right! The answer is there.
Greetings,
Jaap Los
The Netherlands

See also my infrared photography homepage at:
http://home.wxs.nl/~losjb/hometest.html
with lots of infrared photographs, some of them lith-printed.

----- Original Message -----
From: Rolland Elliott <rolland_elliott@xxxxxxxxxxx>
To: <infrared@xxxxx>
Sent: Friday, December 15, 2000 2:51 PM
Subject: Light Piping AND IR transmissive Felts cause fogging.


First of all I'd really recommend doing some research before asking a
question on this list. So many questions could be quickly answered if one
just took the time to search the archives at:
http://www.pauck.de/archive/mailinglist/infrared/infrared.html

To answer your specific question see:
http://www.pauck.de/archive/mailinglist/infrared/mhonarc/msg11927.html

What it all boils down to is that George is right with his comments below:

"I asked one of the Kodak infrared guys about
this.  He told me that the light seal is not IR opaque AND that piping is a
problem. Cheers -George"

I sell daylight loadable IR film. The felt is the MAJOR problem. The light
piping is also a problem, but to less of an extent.

Many people have experienced/seen HIE negatives that have edges that bleed
into the next frame.  This is lightpiping at work.  Usually most apparent at
longer exposures greater than 1/60 of a second.  The reason it isn't more
pronounced is because the angle of incidence is not severe enough and the
exposure time is too short.



*
****
*******
******************************************************
*  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  *
******************************************************