The invention concerns individual protection articles whereof the walls are made of a continuous phase of polyolefin matrix wherein is dispersed a material forming barrier against chemicals and a compatibility agent. The invention further relates to pharmaceutical compositions containing such compounds, to a process for their preparation and to their use for the treatment andor prevention of diseases which are associated with the modulation of SST receptors subtype 5. A beam positioner receiving commands from a programmed controller causes a UV laser beam of a wavelength that is within the light absorption wavelength range to cut into the mask multiple slots with repeatable, precise dimensions.