An apparatus and method for control of spreading of liquid drops are
disclosed. An initial pattern of drops of liquid is deposited on a first
surface. A second surface is brought into sufficient contact with the
initial pattern of the drops that the liquid starts to spread. Two or
more digital images of the liquid are captured after it begins to spread.
A digital analysis is performed on these images to determine whether one
or more portions of the initial pattern of drops require more or less
liquid. A subsequent pattern of liquid droplets is adjusted based on the
digital analysis.