Figure 2.

Multiscale printing by FLOAT. A) Measured curing depths with different types of photoabsorbers. The smaller the curing depth, the greater the vertical resolution of the printed part. B) Increasing photoabsorber concentration reduces curing depth. C) Printing resolution demonstrated by a turbine rotor model printed under different types and concentrations of photoabsorbers. 0.3% and 0.05% QY correspond to undercured and overcured conditions respectively. 0.2% QY represents optimal curing, which results in better part quality than 0.2% Orange G. D) FLOAT-printed vascular tree structure in a PEGDA slab with an area of 3.5 cm ×2.5 cm. E) Enlarged view shows micrometer-scale fine structure of the vascular tree branches. F) FLOAT-printed human hand models of different sizes, a truss model and primitives on a 3.5 cm × 2.5 cm PEGDA slab. G) Enlarged view of the primitives. All models in this figure were printed using 20% PEGDA 4 kDa.