I love these. The negative part of Polaroid 667 film. The bit you're supposed to throw away. But I've kept most of mine. Wonderful Solarized effect. I don't even know if they keep for a day, a week or a month, or maybe they go black, or white, but for a time, they look great. This is a pic of what was the studio in yesterday's pic, but is now our dining room again.