Direct Digital Manufacturing is a family of technologies which is able to product products directly from a digital definition without the use of moulds or other complex tooling. For Direct Digital Manufacturing to take its place as a major manufacturing technology, greater focus is required on the development of new standards and theoretical models on the mathematical conceptualization of what are its physical and methodological limitations. This exploration naturally leads to the concept of a Universal Printer (by analogy with the Universal Turing Machine) and has the purpose of exploring the limits of physical printing. The Universal Printer is a virtual machine with the capability of printing everything that can be printed. Our goal is to establish standards and basic principles that can be used to formalize the concept of 3D printing. A variety of different technologies have begun this process of development and presentations are welcome on any approach as long as the focus is on the exploration of the limits of printing physical objects. We invite papers which address any aspect of this emerging area with respect to both the technology, simulations, optimisation techniques, case studies and applications. Please submit your abstract prepared using the template available here and submit using the form available here. Abstracts will be considered immediately they arrive, so please send your abstract as soon as possible to secure a slot in the programme.