In summer 2008 Polaroid released the PoGo, an instant photo printer producing 2 by 3 inches (51 mm × 76 mm) prints. It uses the Zink ("zero ink") technology which is similar to dye sublimation but has the dye crystals embedded in the photo paper itself.[51] Models CZA-10011B and CZA-20011B exist (which Polaroid claim to be identical).[52]