Figure 6.

Fabrication of demonstration chips from commercial hot-lamination foil (about 80 μm thickness), using a standard office punch (6 mm punch diameter), fine scissors, and hot-lamination machine. (a) The finished chip, showing laminar flow using diluted printer inks (1:10) and water. The fluids are transported by capillary force, and propagated using tissue paper at the outlet. Channel width is about 1.5 mm. Chip outer dimensions: 50 × 60 mm. (b) Top layer (holes only, left) and middle layer (holes and channels, right). The bottom layer is untreated. (c) Schematic of the chip layers.