Abstract: In a process of manufacturing screen material a metal matrix is subjected to an electrolytic metal deposition by using an electrolytic bath containing a brightener, the liquid of the bath being forced to flow through apertures in the anode toward the cathode. The metal deposits grow substantially perpendicular to the lands of the matrix and thus a screen is formed having apertures of approximately the same size as the apertures of the original matrix. The screen can be removed from the matrix by previously coating the latter with a separating agent such as beeswax.

Abstract: A screen skeleton as a cathode is subjected to a pulsed current for depositing metal from an electrolytic bath onto the metal regions of the screen skeleton, said electrolytic bath containing a brightener of the second class. This process involves growth of metal substantially perpendicular to the screen skeleton surfaces thus maintaining the size of the openings of the screen skeleton.Small pulse current durations are advantageous. Preferably a pulsed current is used comprising pulse current and non-pulse current durations; more preferably the pulse current durations are subdivided into small pulse current and non-current pulse periods.

Abstract: In a process of manufacturing screen material a metal matrix is subjected to an electrolytic metal deposition by using an electrolytic bath containing a brightener, the liquid of the bath being forced to flow through apertures in the cathode toward the anode. The metal deposits grow substantially perpendicular to the lands of the matrix and so form a screen having apertures of approximately the same size as the apertures of the original matrix. The screen can be removed from the matrix by previously coating the latter with a separating agent such as beeswax.An installation for performing the process of the invention comprises a perforated cathode as matrix being fixed to cathode fixing means, a perforated anode being fixed to anode fixing means and a pump for providing a forced flow of liquid through the apertures of the cathode toward the anode.