Abstract: An example method of performing a null cycle in a liquid electrographic printer is described. The method involves collecting, at a photo imaging plate cleaning station, imaging oil deposited on a photo imaging plate during a print cycle. During a null cycle, the photo imaging plate cleaning station is controlled to apply the collected imaging oil to the photo imaging plate.

Abstract: An embossing apparatus includes an embossing die that includes a printed relief pattern made up of multiple layers of a deposited material. A resilient surface presses media against the embossing die such that embossed features corresponding to the embossing die are formed in the media. A method for embossing media includes forming an embossing die by depositing multiple layers of ink on a impression layer to form a relief pattern and pressing media against the embossing die to transfer the relief image to the media.

Abstract: There is provided a method and apparatus for preparing a print substrate. A surface resistivity of a print substrate comprising a conductive layer is determined. The determined surface resistivity is compared to a print range having a lower threshold value for the surface resistivity of the print substrate and an upper threshold value for the surface resistivity of the print substrate. If the determined resistivity of the print substrate is outside the print range, a surface modification is selected to adjust the determined surface resistivity of the print substrate to fall within the print range. The selected surface modification is applied to the top layer of the print substrate.

Abstract: The present disclosure relates to an electrophotographic active ink composition comprising a thermoplastic polymer comprising a copolymer of an olefin and acrylic acid and/or metacrylic acid; active photovoltaic material comprising electron donor material and electron acceptor material; a charge adjuvant, and a liquid carrier.

Abstract: An example method of performing a null cycle in a liquid electrographic printer is described. The method involves collecting, at a photo imaging plate cleaning station, imaging oil deposited on a photo imaging plate during a print cycle. During a null cycle, the photo imaging plate cleaning station is controlled to apply the collected imaging oil to the photo imaging plate.

Abstract: An example method of performing a null cycle in a liquid electrographic printer is described. The method involves collecting, at a photo imaging plate cleaning station, imaging oil deposited on a photo imaging plate during a print cycle. During a null cycle, the photo imaging plate cleaning station is controlled to apply the collected imaging oil to the photo imaging plate.

Abstract: According to an example, an electrophotographic ink may include an adsorbent, a volatile fragrance, a resin and a carrier liquid.

Abstract: This disclosure relates to an electrophotographic composition comprising toner particles dispersed in a liquid carrier. The toner particles comprise porous carrier particles infused with a fragrance.

Abstract: An example method of performing a null cycle in a liquid electrographic printer is described. The method involves collecting, at a photo imaging plate cleaning station, imaging oil deposited on a photo imaging plate during a print cycle. During a null cycle, the photo imaging plate cleaning station is controlled to apply the collected imaging oil to the photo imaging plate.

Abstract: According to an example, an electrophotographic ink may include an adsorbent, a volatile fragrance, a resin and a carrier liquid.

Abstract: An embossing die is created by printing multiple ink layers (530, 540) in superposition thereby to build up a printed relief pattern (510) in accordance with received design data specifying a design to be embossed. The design data is modified after receipt to introduce into the printed relief pattern to be built, one or more channels (610) which extend depth-wise through multiple ink layers of the printed relief pattern (510) and serve to fully or partially segment the printed relief pattern.

Abstract: This disclosure relates to an electrophotographic composition comprising toner particles dispersed in a liquid carrier. The toner particles comprise porous carrier particles infused with a fragrance.

Abstract: There is provided a method and apparatus for preparing a print substrate. A surface resistivity of a print substrate comprising a conductive layer is determined. The determined surface resistivity is compared to a print range having a lower threshold value for the surface resistivity of the print substrate and an upper threshold value for the surface resistivity of the print substrate. If the determined resistivity of the print substrate is outside the print range, a surface modification is selected to adjust the determined surface resistivity of the print substrate to fall within the print range. The selected surface modification is applied to the top layer of the print substrate.

Abstract: There is disclosed a computer program product for carrying out a method of calibrating a thickness of an embossing die, the embossing die being formed from a plurality of ink layers printed by an apparatus. According to the method, an average thickness of an ink layer printed by the apparatus may be calculated, and a target die thickness may be calculated as a function of the average ink layer thickness. A system for implementing a method of calibrating a thickness of an embossing die and a method of measuring a thickness of an embossing die are also disclosed.

Abstract: An embossing die is created by printing multiple ink layers (530, 540) in superposition thereby to build up a printed relief pattern (510) in accordance with received design data specifying a design to be embossed. The design data is modified after receipt to introduce into the printed relief pattern to be built, one or more channels (610) which extend depth-wise through multiple ink layers of the printed relief pattern (510) and serve to fully or partially segment the printed relief pattern.

Abstract: There is disclosed a computer program product for carrying out a method of calibrating a thickness of an embossing die, the embossing die being formed from a plurality of ink layers printed by an apparatus. According to the method, an average thickness of an ink layer printed by the apparatus may be calculated, and a target die thickness may be calculated as a function of the average ink layer thickness. A system for implementing a method of calibrating a thickness of an embossing die and a method of measuring a thickness of an embossing die are also disclosed.

Abstract: An embossing die is created by printing multiple ink layers (530, 540) in superposition thereby to build up a printed relief pattern (510) in accordance with received design data specifying a design to be embossed. The design data is modified after receipt to introduce into the printed relief pattern to be built, one or more channels (610) which extend depth-wise through multiple ink layers of the printed relief pattern (510) and serve to fully or partially segment the printed relief pattern.

Abstract: There is disclosed a computer program product for carrying out a method of calibrating a thickness of an embossing die, the embossing die being formed from a plurality of ink layers printed by an apparatus. According to the method, an average thickness of an ink layer printed by the apparatus may be calculated, and a target die thickness may be calculated as a function of the average ink layer thickness. A system for implementing a method of calibrating a thickness of an embossing die and a method of measuring a thickness of an embossing die are also disclosed.

Abstract: An embossing apparatus comprises an embossing die comprising a printed relief pattern, and a resilient surface for pressing media against the embossing die to emboss features corresponding to the printed relief pattern on the media, in which the printed relief pattern comprises a number of layers of a deposited material, and in which a number of layers of the deposited material closest to the top of the printed relief pattern comprises a deposited material with a relatively lower coefficient of adhesion than layers of the deposited material disposed under the deposited material closest to the top of the printed relief pattern. A printed relief pattern for embossing media comprises a number of preliminary layers, the preliminary layers comprising a first material, and a number of terminal layers, the terminal layers comprising a second material, in which the second material has a lower adhesive coefficient than the first material.

Abstract: An embossing apparatus includes an embossing die that includes a printed relief pattern made up of multiple layers of a deposited material. A resilient surface presses media against the embossing die such that embossed features corresponding to the embossing die are formed in the media. A method for embossing media includes forming an embossing die by depositing multiple layers of ink on a impression layer to form a relief pattern and pressing media against the embossing die to transfer the relief image to the media.