A printing process to decorate Architectural Aluminum Profile bars achieved by the following steps. A colored powder coating is applied as a base coat. The coated aluminum profile bar is driven into a tunnel oven (3) for heating and the temperature is checked at the exit from the tunnel oven by optical thermometer (4). The hot bar enters immediately into a printing unit (5). Special constructed pressing silicon cylinders (11) force the transfer paper or transfer fabric (7) to cover the aluminum bar. The sublimable ink on the printing material penetrate the base coat, by sublimation, leaving the pattern on it. The printing materials are automatically removed after use (12). A transparent powder coating is applied as top coat to achieve maximum outdoor resistance.