Doctor blade

摘要

A doctor blade for wiping printing ink off a surface of a printing plate, comprising a flat and elongated main body having a working edge region configured in a longitudinal direction, the working edge region being covered with a first coating on the basis of a nickel-phosphorus alloy applied by electroless deposition, and hard material particles being dispersed in the first coating, characterized in that the first coating is covered with a second coating on the basis of galvanically deposited nickel.

主权项

1. A doctor blade, in particular for doctoring off printing ink from a surface of a printing form, comprising a flat and elongated main body having a working edge region formed in a longitudinal direction, wherein the working edge region is covered with a first coating on the basis of an electrolessly deposited nickel-phosphorus alloy, and wherein hard material particles are dispersed in the first coating, wherein the first coating is covered with a second coating on the basis of electrodeposited nickel, thereby providing said first coating of nickel-phosphorus alloy covered by said second coating of nickel that is substantially free of phosphorus and wherein said second coating comprises a base layer, which adjoins the first coating and consists essentially of pure nickel, and a top layer arranged thereabove, wherein the thickness of the base layer measures 0.2-0.8 μm and wherein the top layer contains at least one of a saccharin or a saccharin salt.