Yesterday I was using Fuji FP 100C in 4x5 for the first time. Beautiful film, excellent fit and finish on the Fuj PA45 holder, etc. I got distracted and didn't peel one of the films for about an hour. Not only was there a positive, but under the goo on the "sender" sheet was a copper colored positive image. I peeled away all the backing paper, washed the goo off in cold water, then dried the sheet. I scanned the image, but it has faded away overnight. Does anyone know how to preserve this image? Is there a way to coat/treat the sender sheet chemically?