A process for producing printed articles which comprises forming an under coat on a cloth having a rough surface with a foamed composition of a resin emulsion by printing, drying the formed under coat, forming a top coat on the dried under coat by printing and drying the formed top coat. The first set of conductive electrodes is configured to receive a selection signal. The first optical component transforms the primary light source into a plurality of secondary light sources that are imaged by the second optical component in the exit pupil. The intermediate signals are coupled to the channel filter. Therefore, the operational cord is simply drawn to trigger the linkage mechanism and synchronically lift the second string ladders so as to alternatively collect and arrange the slats in pairs, facilitating an easier and speedier operation thereof to achieve the best using status.