Customizable apparatus and method for transporting and depositing fluids

A rotating roll for depositing a plurality of fluids on a substrate, the rotating roll comprising:

• a central longitudinal axis, wherein the rotating roll rotates about the central longitudinal axis;
• an exterior surface defining an interior region and substantially surrounding the central longitudinal axis;
• a vascular network configured for transporting each fluid in a predetermined path from the interior region to the exterior surface of the rotating roll, the vascular network comprising a plurality of channels comprising a plurality of main arteries, a plurality of first capillaries, and a plurality of fluid exits on the exterior surface, wherein:
• each of the main arteries comprise an inlet and is substantially parallel to the central longitudinal axis of the rotating roll, and wherein each fluid enters the vascular network at the inlet;
• and
• wherein each of the first capillaries is associated with one of the main arteries and is in fluid communication with the one of the main arteries and at least two fluid exits through substantially radial paths in a tree expanding both axially and circumferentially in a radial direction from the main artery to the exterior surface.