Fig. 4: NIR-DIW-printed multicolor filament and colored freestanding structures.
From: 3D printing of multi-scalable structures via high penetration near-infrared photopolymerization
a Top view and b side view of core-shell multicolor filament, the scale bar is equivalent to 2 mm; c freestanding spiral structure with red pigments; d freestanding M-shaped cantilever structure with blue pigments, the scale bar is equivalent to 1 cm.
