AbstractUsing low‐melting enamel glasses it could be managed to develop a protecting glassy embedding for luminescent pigments. Such a lasting protection from greying ‐ especially against UV light in the presence of humidity ‐ offers new operational areas to luminescent pigments like the outdoor area. In the present work the luminescence spectra and decay functions of phosphorescent glasses are examined. For a ZnS pigment and a newly developed SrO‐aluminate pigment of high phosphorescence efficiency it could be shown that the emission spectra of the phosphorescent glasses do not essentially differ from those of the pure pigments. The phosphorescence efficiency of ZnS phosphorescent glass could be increased by more than 10 per cent by reducing the TiO2 content regarded as optimal up to now. First experiments show that an SrO‐aluminate pigment can also be embedded in a glassy matrix. Indeed, intensity losses of 70 per cent appeared. Here a high potential of improvement is to be assumed. Further investigations are necessary. In addition we have found that the phosphorescence decay functions of the samples under investigation depend on the excitation time. The phosphorescent glass can be universally applied as granules or as formed bodies and offers manifold applications.