The present disclosure relates to a method for obtaining a face of a housing to be mounted, in a mounting position, on the body of an electronic device, the housing includes a panel designed to cover, in the mounting position, a portion of a display screen of the device to be illuminated. In some embodiments of the present disclosure, a method describes moulding of the panel from a first mixture of a base material and a concealing material, the first mixture meeting a first transparency criterion, defined based on an optical parameter value, so as to make it possible, in the mounting position, to conceal the screen portion, by the panel, in the absence of lighting from the screen and to make the screen visible when it is illuminated, through the panel.