Print on the go with the Polaroid 3 x 4 Inch Zink Paper, designed to work with the Polaroid Z340 Instant Camera. The Zink paper is built up of three layers of specially designed crystals that are activated & coloured by heat. With 400 million heat pulses, the Zink paper transforms into a high quality, full colour photograph in a matter of seconds. Once printed, the Zink photos are water resistant, smudge proof & tear proof.