A viscosity measurement device includes a measurement tool having a pump for feeding a printing liquid by pressure. The viscosity measurement device includes a passage part having a first passage part in which a flow path cross-sectional area for the printing liquid is set at a first area, and a second passage part in which a flow path cross-sectional area for the printing liquid is set at a second area smaller than the first area and which is arranged on an upstream side in a supply direction of the printing liquid with respect to the first passage part, the passage part being interposed in the supply path and arranged upward toward a downstream side in the supply direction of the printing liquid; and a sensor attached to the second passage part and measuring the fall time of the measurement tool in a prescribed vertical region in the second passage part.

A method for creating a printed product includes providing a printing substrate, providing a first fluid, applying the first fluid to the printing substrate as a first layer, providing an effect fluid as a second fluid, the effect fluid including a carrier fluid and platelet-shaped effect pigments, and applying the effect fluid to the printing substrate as a second layer, the second layer forming an effect layer. The first layer is created as a duct layer having a multiplicity of ducts. The ducts allow at least a portion of the carrier fluid of the effect fluid to pass through or enter, and the ducts substantially do not allow the effect pigments of the effect fluid to pass through or enter. This provides a cost-efficient and advantageous way of creating high-quality printed products with top quality finish and special effects having improved impact of the special effects.

A method for creating a printed product includes providing a printing substrate, providing a first fluid, applying the first fluid to the printing substrate as a first layer, providing an effect fluid as a second fluid, the effect fluid including a carrier fluid and platelet-shaped effect pigments, and applying the effect fluid to the printing substrate as a second layer, the second layer forming an effect layer. The first layer is created as a duct layer having a multiplicity of ducts. The ducts allow at least a portion of the carrier fluid of the effect fluid to pass through or enter, and the ducts substantially do not allow the effect pigments of the effect fluid to pass through or enter. This provides a cost-efficient and advantageous way of creating high-quality printed products with top quality finish and special effects having improved impact of the special effects.

There is disclosed a selective wetting apparatus comprising a roller rotatable about a roller axis and comprising a wettable roller surface; an applicator unit having a lip which extends parallel to the roller axis and is radially spaced apart from the roller surface by a gap, wherein the applicator unit is to convey liquid agent towards the roller so that the liquid agent forms a liquid bridge over the gap to wet a wetted axial portion of the roller surface; and a flow guide to direct a gas flow into a regulated axial portion of the gap to locally prevent formation of a liquid bridge, and thereby prevent wetting of a corresponding axial portion of the roller surface.

There is disclosed a selective wetting apparatus comprising a roller rotatable about a roller axis and comprising a wettable roller surface; an applicator unit having a lip which extends parallel to the roller axis and is radially spaced apart from the roller surface by a gap, wherein the applicator unit is to convey liquid agent towards the roller so that the liquid agent forms a liquid bridge over the gap to wet a wetted axial portion of the roller surface; and a flow guide to direct a gas flow into a regulated axial portion of the gap to locally prevent formation of a liquid bridge, and thereby prevent wetting of a corresponding axial portion of the roller surface.

Certain examples of seals that can move along a slit are disclosed. The seals can comprise a first leaf, a second leaf, and a biasing member to push the first leaf away from the second leaf. Also, apparatus for applying a fluid, and printing systems are described.

A doctor blade holder and adjustment mechanism that may be utilized with a flexographic printing system. The doctor blade holder and adjustment mechanism may utilize a constant displacement of the doctor blade against an anilox roller, rather than a constant force, to reduce ink build up on the back side of the doctor blade, and subsequently, intermittent dropping of the accumulated ink onto the post-shearing side of the anilox roller (“spitting”). The doctor blade holder and adjustment mechanism may provide adjustability of a combination of doctor blade pressure, angle and displacement.

A doctor blade band is disclosed. The doctor blade may be used for cutting individual doctor blades for printing technology, in particular for gravure printing, flexographic printing and/or screen printing. The doctor blade band includes a flat and elongate base body with a working edge region formed in a longitudinal direction. The doctor blade band has continuous predetermined breaking points running at defined intervals along the longitudinal direction transversely to the longitudinal direction.

A doctor blade band is disclosed. The doctor blade may be used for cutting individual doctor blades for printing technology, in particular for gravure printing, flexographic printing and/or screen printing. The doctor blade band includes a flat and elongate base body with a working edge region formed in a longitudinal direction. The doctor blade band has continuous predetermined breaking points running at defined intervals along the longitudinal direction transversely to the longitudinal direction.

A flexographic printer is provided with: a printing plate for transferring ink at an ink transfer site to an object to be printed S; an anilox roll for supplying ink to the printing plate at an ink supply site; a plate cylinder on which the printing plate is wound and rotated; and an ink solvent supply unit for supplying a solvent for the ink on the surface of the printing plate in a post-ink transfer region that is downstream of the ink transfer site in the plate cylinder rotation direction and upstream of the ink supply site in the plate cylinder rotation direction.