The invention relates to a value document, especially a banknote, having a sequence of layers into which visually andor mechanically perceptible identifiers in the form of patterns, letters, numbers or images are introduced by the action of laser radiation. In one embodiment, the magnetic memory array includes a plurality of cell columns and a pair of reference cell columns, including a first reference cell column and a second reference cell column. Based on location coordinates found by this blob analysis section, a rotation angle calculation section finds a rotation angle for a horizontal series of the to-be-inspected objects against a horizontal line. The method may also include selecting each object in the object relational graph which contains at least one facet and identifying each object in the object relational graph on which at least one facet condition applies. The fluid egress channels define a structured bonding surface having exit pathways for fluid to bleed out from behind the article when the structured bonding surface is adhered to or otherwise disposed on a substrate.