Recently on the Flickr Polaroid forum it has been discovered that the black backing on Fuji peel-apart films can be removed by applying household bleach. The result is a film negative. Eagerly looking for a Polaroid 665 replacement, I gave it a try. The FP-100C color film works really well. The negative is sturdy. The film has a purplish mask. Using hybrid techniques, I was able to recover the image with very surprising quality. Being able to recover a color negative is very exciting and new! The FP-3000B film has a reflective backing so things don't work there. Reflective scanning using hybrid technique does work. The FP-100B film reveals a clear film base and a negative image. There are two problems that I am hoping the geniuses on APUG can help me with. First, the negative is very thin. The density on the negative is minimal. Does anyone have any ideas on how to improve this (timing before peeling, temperature, chemical treatment, intensifiers, etc)? Second, there appears to be solarization in parts of the negative. Some places on the negative have a much more dense reddish hue. I'm not sure how to get rid of this where it is undesireable. Also, I am hoping this can be tamed and used to increase density. Ideas are appreciated. Or, maybe you have a better idea? I am looking to take a photo, get a negative immediately, and make a cyanotype as part of a 1 hour science demonstration. Thanks!