As promised, here's how I file and store my 8x20 negatives.
I knew as time passed, I could get a pretty big stack of negatives, I wanted to keep them in smaller groups held vertically in such a way as to minimize stack weight and make accessability quick & easy (just like down at the office...).
I use the "Pendaflex" hanging file concept using Tyvek hangers.
There's a 1/2" wide strip of matboard glued in the hanger floor so the negatives don't bunch up at the bottom.
The rails are scavenged from hanging file drawer frames.
Each negative has an inner sleeve of archival tissue (16x20, folded in half, from Hollinger) .
The outer folder is archival bond paper (16x20, folded in half, from Hollinger).
Sleeve "down", folder "up", so the negative is enclosed in a "sandwich".
I try to keep no more than two dozen negatives in each hanger.
The box sidewalls and lid are acid free binder board (or 8-ply mat board).
The box ends and floor are Basswood, the wood of choice for long term storage containers because of it's low emission characteristics.
The box inner dimensions are: 4 x 21 x 9-1/4" deep, and can comfortably hold about 100 ~ 125 negatives.
The fun thing about 8x20 is that you get a chance to invent all sorts of unique solutions compared to those folks who store their photo's on CD's.
Life is a rich & exciting game...
Reinhold
www.classicBWphoto.com