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