From:             Joshua_Putnam <josh@WOLFENET.com>
Subject:          Re: IR proof changing bag
To:               INFRARED@A1.NL (infrared mailing list)
Date sent:        Thu, 7 Oct 1999 09:45:19 -0700 (PDT)
Send reply to:    infrared@a1.nl

>I wonder if this would also apply to the rubber-lined darkroom cloth, used for
>covering my darkroom door-opening? Hmmmm.

In my experience, yes.  In picking a fabric for making my own
changing bag I tried various materials.  As a first test I tried
my NightShot camcorder, aiming it straight at the sun through the
cloth I was testing.  I then tested a sample of the fabric by
wrapping up a piece of HIE in my dark room then laying it in the
sun.  

All of the black-rubber-coated fabrics I tried were IR safe.  

I ended up using rubber-coated polar fleece from Malden Mills.
It's not sold as light-tight fabric, but it has a very tough
layer of polyurethane rubber on one face, and black fleece on the
other, so that a rolled closure is quite light-tight.  (Besides
that I already had several spare yards of the fabric left over
from making winter cycling gear.)

-- 

 Josh@WolfeNet.com  is  Joshua Putnam / P.O. Box 13220 / Burton, WA 98013
                       "My other bike is a car."                   
                     http://www.wolfenet.com/~josh/