Patent ID: 8491830

Claim:
A method for designing an engineered boundary between regions of dissimilar materials within a print-formed structure, the method including the steps of: identifying a boundary between at least two materials including a first material and a second material, the boundary including a distribution of said first material approaching the boundary and passing the boundary from a first material side, and a distribution of the second material approaching the boundary and passing the boundary from a second material side, the first material side having more of the first material than the second material and the second material side having more of the second material than the first material; putting at least a portion of the first material on the second material side of the boundary and at least a portion of the second material on the first material side of the boundary; and wherein portions of the first material on the second material side of the boundary are distributed randomly adjacent to the boundary and portions of the second material on the first material side of the boundary are distributed randomly adjacent to the boundary.