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Pictures of the 3D printed closed channels using Detax (A), Asiga (C), and Keyprint (E) resins. All the structures in (A,C,E) consist of four channels of 1 mm width and 500 µm height with a different number of layers in the cover of the channel (1, 2, 4, 8 layers of 100 µm each from left to right). A zoomed view of the channel with a cover of 100 µm printed can be also seen with the Detax (B), the Asiga (D), and the Keyprint (F) resins.
