Raft techniques in three-dimensional printing

A computer program product for operating a three-dimensional printer comprising non-transitory computer executable code embodied in a non-transitory computer-readable medium that, when executing on one or more computing devices, performs the steps of:

• determining a processing height for depositing each of a plurality of layers in the three-dimensional print;
• fabricating a first layer of the three-dimensional print at a distance from an underlying layer no greater than the processing height to form a raft for an object;
• fabricating a second layer of the three-dimensional print on the raft to form an initial layer of the object, wherein the second layer is extruded at a distance from a top of the first layer greater than the processing height, thereby forming a relatively weak bond between the first layer and the second layer;
• and
• fabricating a third layer of the three-dimensional print on the initial layer of the object, wherein the third layer is extruded at a distance no greater than the processing height from a top of the second layer, thereby forming a relatively strong bond between the second layer and the third layer.