Right now, Snapchat is in the midst of launching an enormous IPO. The digital service has racked up billions of dollars in market value on the backs of photos and videos that disappear after just 24 hours. It's a flummoxing concept to many photography enthusiasts. We're capturing images while users on Snapchat or Instagram stories or any number of similar services play catch and release with their smartphone cameras. But, it turns out that the disappearing photo isn't a new concept. In fact, if you dig into Polaroid's fascinating stable of retired films, you'll find a quirky stock called Fade to Black, which was designed to take a picture that completely disappeared within 24 hours.