The name can be - possibly - on the craft of early medieval weapons production back, the "Bleier (cast in lead) or the" blue stain ". Earlier, the iron and steel for weapons "blued" was. Pleyer (of gepleut?? Beaten firmly) described the old masters and melting is due to the time when the metal was still hammered out from the red ore.?
(Sent from: Dagmar Schultz-Javurek, geb. Pleyer)