Abstract: The invention concerns a device forcreating a printing plate including a support (1) designed to be exposed to liquid photopolymer then a film designed to constitute the base of the printing plate, a means of application (3) of the liquid photopolymer on the support (1) in a layer (2) of predetermined thickness and a means of verification (5) of the actual thickness of the layer (2) applied. The means of verification includes a detector (5), mounted on the downstream side of the means of application (3), such that it is situated over a section of the photopolymer layer (2) that has just been applied, the detector (5) generating an electric signal, on the basis of which the flow of photopolymer is adjusted, when the actual thickness of the layer (2) applied differs from the predetermined value. The invention also concerns a procedure of making a printing plate, preferably implemented via said device.

Abstract: A method for making plates from photopolymer sheets which have previously been exposed to ultraviolet radiation, to convert the sheets into printing plates for flexographic, letterpress or dry-offset printing, includes brushing the exposed faces of the sheets with a brush assembly having a row of flat brushes with generally rectangular brushing surfaces. The brushes each undergo a movement of horizontal rotation and the brush assembly also undergoes at least one movement of reciprocating horizontal translation. Each brush is offset by 180° in its horizontal rotation with respect to the immediately adjacent brush, or to the two immediately adjacent brushes in the row. Also disclosed is an apparatus for performing the method.