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HP's Sprocket 3x4 Instant Photo Printer, not much bigger than models for wallet-size output, churns out decent-quality 3.5-by-4.25-inch pics on the go—and without an ink cartridge.

Lifeprint's launching a brand new augmented reality printer that prints out larger 3x4.5-inch photos. Use your phone to scan them for a hidden video. Digital Culture Tech Science Life Social Good ...