the binder including {HEAD ~ a Lead Borosilicate glass} composed of Lead Oxide, {TAIL ~ Lead Silicate}, Boric Oxide and Aluminum Oxide, or a Lead Boroaluminosilicate glass composed of Silica, Aluminum Oxide, Boron Oxide, and Lead Oxide, 
composed of
the binder including { HEAD ~ a Lead Borosilicate glass } composed of Lead Oxide , { TAIL ~ Lead Silicate } , Boric Oxide and Aluminum Oxide , or a Lead Boroaluminosilicate glass composed of Silica , Aluminum Oxide , Boron Oxide , and Lead Oxide ,
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH