A radiation-curable ink jet composition comprises a polymerizable compound component including a monofunctional monomer component and a multifunctional monomer component. The content of the monofunctional monomer component is 87 mass % or more based on the polymerizable compound. The monofunctional monomer component includes a nitrogen-containing monofunctional monomer component, and the content of the nitrogen-containing monofunctional monomer component is 14 mass % or less based on total amount of the radiation-curable ink jet composition. The weighted average of the glass transition temperatures of homopolymers of the respective polymerizable compounds is 42 C. or more when the mass ratios of the contents of the respective polymerizable compounds are weighted.

An ink composition including a humectant blend comprising a first humectant and a second humectant; wherein the first humectant has a freezing point; wherein the second humectant suppresses the freezing point of the first humectant such as to impart to the ink composition the characteristic of being able to be stored at a desired temperature without solidifying; water; an optional co-solvent; an optional colorant; and a sulfonated polyester. A process of digital offset printing using the ink composition.

An ink composition including a humectant blend comprising a first humectant and a second humectant; wherein the first humectant has a freezing point; wherein the second humectant suppresses the freezing point of the first humectant such as to impart to the ink composition the characteristic of being able to be stored at a desired temperature without solidifying; water; an optional co-solvent; an optional colorant; and a sulfonated polyester. A process of digital offset printing using the ink composition.

The power supply apparatus includes a control unit configured to perform control of gradually changing a turn-on duty of a first switching element when a first voltage mode is switched to a second voltage mode or when the second voltage mode is switched to the first voltage mode.

The power supply apparatus includes a control unit configured to perform control of gradually changing a turn-on duty of a first switching element when a first voltage mode is switched to a second voltage mode or when the second voltage mode is switched to the first voltage mode.

A method for enabling marking of a pattern on a substrate with an industrial printer includes executing a genetic algorithm based on the pattern to be marked on the substrate. A result of the genetic algorithm indicates a resulting path which the industrial printer should follow when marking the pattern on the substrate. It is determined if the resulting path fulfills at least one criterion of: the resulting path matches an optimal path for marking the pattern, the resulting path substantially matches the optimal path, or a time spent for executing the genetic algorithm has reached or exceeded a threshold.

A security document (e.g. passport) comprising a protective feature for authenticating a laminate data sheet thereof and method for making the same. A metalized flexible hinge attached to the laminate data sheet is used to bind the laminate data sheet into the passport with one or more other sheets at a binding of the passport such that at least a portion of the metalized surface of the flexible hinge is visible proximate to the laminate data sheet. Personalization data is etched on the visible portion of the metalized surface of the flexible hinge and matches personalization data of the laminate data sheet.

A security document (e.g. passport) comprising a protective feature for authenticating a laminate data sheet thereof and method for making the same. A metalized flexible hinge attached to the laminate data sheet is used to bind the laminate data sheet into the passport with one or more other sheets at a binding of the passport such that at least a portion of the metalized surface of the flexible hinge is visible proximate to the laminate data sheet. Personalization data is etched on the visible portion of the metalized surface of the flexible hinge and matches personalization data of the laminate data sheet.

A method for enabling marking of a pattern on a substrate with an industrial printer includes executing a genetic algorithm based on the pattern to be marked on the substrate. A result of the genetic algorithm indicates a resulting path which the industrial printer should follow when marking the pattern on the substrate. It is determined if the resulting path fulfills at least one criterion of: the resulting path matches an optimal path for marking the pattern, the resulting path substantially matches the optimal path, or a time spent for executing the genetic algorithm has reached or exceeded a threshold.

An image forming apparatus includes a photosensitive member, a light source, a deflecting unit, a storing unit, a correcting unit, and a light source driving portion. Magnification correction data is determined using a quadratic function of a variable representing a scanning position with respect to a scanning direction. Coefficients of two quadratic functions corresponding to adjacent two regions included in a plurality of scanning regions are set so that a differential value calculated at the variable corresponding to a boundary of the two regions by a differential of the quadratic function for one region and a differential value calculated at the variable corresponding to the boundary of the two regions by a differential of the quadratic function for the other region are equal to each other.