Printed electronics promises the ability to manufacture devices through low-cost, high-throughput manufacturing. However, to realize this potential, it requires the right materials and inks. We focus on three materials areas - opaque conductive inks and pastes, transparent conductors, and semiconductors, presenting a total opportunity of $2.6 billion in 2017. Opaque conductive inks will grow to $2.4 billion in 2017, with medical and RFID among the fastest-growing segments. However, silver paste will still dominate, and other materials will only find traction in solar applications. ITO replacement transparent conductive films will grow to $705 million, with $112 million coming from the inks, but the majority of this market will come from a single application, smartphone touch screens, leading to a wide range of potential growth scenarios. Printed semiconductors will grow to $68 million in 2017 with display applications leading the way.