zcr: dobrý objev. Taky 37. stránka (nadepsaná jako str. 27): "The use of blood in industry includes, adhesives, resin extenders, insecticides (used as an agent to cause the product to stick) spray adjuvant, in porous concrete, ceramic and plastic manufacture, among other uses (Divakaran)."
Děd nevěd: ale je to zajímavá souvislost, železo - krev - krevel.