Polaroid sells a film called Time Zero or SX-70, it goes by both names. This film is slow to develop and sensitive during this process. The interesting benefit of this is the photo can be manipulated while developing with very interesting and unique results. Images can be created with a painterly or impressionistic look, or completely abstracted or distorted.

Here are two photos I created this way:

• Shell Bridge, Foster City
  
• Flowers

Another technique with Polaroids is the Emulsion transfer. This uses Polaroid's 669 film, which you place in hot water (~170°) for four minutes. Afterwards, the emulsion comes off the Polaroid back and is malleable. It can then be peeled off and transferred to another medium, such as paper instead of plastic. In the process, the image can be reformed and distorted as the artist wishes.

• View Emulsion Transfers (5 images)

• Polaroid Time Zero SX-70 Manipulation Technique [Polaroid.com]
• Polaroid SX-70 Manipulation Gallery [Polaroid.com]
• Poloaroid Emulsion Life Technique [Polaroid.com]
• Polaroid Emulsion Lift Gallery [Polaroid.com]