A screen printing procedure was developed to deposit catalyst coatings into microchannels by wash-coating through a low-cost technique suited for mass production. The composition of the suspension was optimized regarding the choice of solvent, binder, and additive so as to achieve both optimum rheological properties for screen printing and catalyst adhesion. The feasibility of screen printing catalysts into arrays of plates carrying microchannels was demonstrated and the long-term durability of the catalytic performance of the screen-printed coatings was proven experimentally.