The Science of Doctor Blades

Solution: Quality blades, and the use of ink filters and magnets can remedy streaking. Angle analysis is also important. "The steep angle [of 55 to 65°] allows the ink to flush out all of the insoluble particles behind the blade and does not allow them to get trapped under the blade causing damage to the blade, therefore, eliminating streaking," said Stamey. "Using filters and magnets will help to thoroughly eliminate the hard, insoluble particles, which cause blade damage."