Patent ID: 6224729
Filing Date: 2001-05-01
Classification: B41C,Y10S

Abstract:
In an electrocoagulation printing method comprising the steps of:a) providing a positive electrolytically inert electrode having a continuous passivated surface moving at substantially constant speed along a predetermined path, said passivated surface defining a positive electrode active surface;b) forming on said positive electrode active surface a plurality of dots of colored, coagulated colloid representative of a desired image, by electrocoagulation of an electrolytically coagulable colloid present in an electrocoagulation printing ink comprising a liquid colloidal dispersion containing said electrolytically coagulable colloid, a dispersing medium, a soluble electrolyte and a coloring agent; andc) bringing a substrate into contact with the dots of colored, coagulated colloid to cause transfer of the colored, coagulated colloid from the positive electrode active surface onto said substrate and thereby imprint said substrate with said image;the improvement wherein said positive electrode is made of an iron alloy consisting essentially of:Cr: at least 20 wt. %Ni: 5 to 15 wt. %Si: 1 to 2 wt. %Mn: 0.9 to 1.5 wt. %C: 0.1 to 0.3 wt. %balance: iron and unavoidable impurities.