The present invention relates to a process for the manufacture of a plasma panel comprising two tiles facing each other and containing a plasma discharge gas, at least one of the tiles having an array of electrodes serving to define a number of discharge cells and an array of supporting barriers delimiting the cells, the barriers being made of a material giving them a high and open porosity. According to the process, the barriers 30 are formed in a single step using a paste comprising the said material and an organic resin.