Polaroid film, in its various guises was discontinued in 2008 when instant film production ceased. Often people believe that Polaroid was just a novelty product to capture snapshots - however this is not the case. Polaroid material has been used by serious artists in various guises. Ansel Adams for one was a consultant for Polaroid (along with Kodak and Hasselblad). Many other prominent photogrpahers used Polaroid material for finsihed products and as a way to validate exposure and composition prior. Remember this was before Digital Cameras and the ubiquitous preview screen!
I used two of their products. The 1st was SX-70 which used a sophisticated single lens reflex camer and when you pressed the shutter button, a small square color image popped out of the front. While the image was developing in your hand, you could 'smush' the soft emulsion, and move the image around. Using varius tools you could enhance your composition. These images are in color.
The 2nd product I used was Type 55. This was used in conjunction witha special Polaroid film holder and a 4x5 Camera. Type 55 would give you both a Black and White Print and a Negative. These negatives when printed were quickly identified by the sloppy edges when printed full frame. The film was very slow (ASA 25 to 50) and was very fine grained.