Топик По Английскому Языку (Петренко Ю. М.) / Digital printing

Digital printing.

Non-impact printing technologies (NIP technologies) are technologies that do not require a solid printing plate with a fixed image and that can basically produce successive pages with different printed images.

A laser sends information to an intermediate carrier, a drum with a photoconductive coating, without impact (non-impact) in the traditional sense. The latent (nonvisible), charged image stored on this drum is inked with toner and then transferred to the paper. There is, of course, contact between the inked (toned) information carrier and the paper during printing, but the information is not transferred by impact. This process is considered as non-impact printing.

In NIP technologies there is no printing plate carrying permanent information. This has given rise to new, efficient ways of producing printed media, such as print on demand, personalization, book on demand, and so forth.

Market segments: short-run jobs, proofing applications, personalization, office and DTP applications.

There is a number of non-impact printing technologies. They are named after physical or chemical principle they are based upon (electrophotography, ionography, Magnetography, ink jet, Thermography, electography, Photography, «X»-Graphy ).«X»-Graphy:«Direct imaging/inductive printing*, «TonerJet», «Elcography», «Zurography».

Toners:powder or liquid.

NIP technologies can be sheet-fed or web-fed printing.

Magnetography.

Magnetography is a variant of the non-impact printing technologies. The magnetic fields attract ferrous magnetic powder toner particles via a special inking unit. In principle the magnetography imaging drum is capable of storing a magnetic pattern generated on the surface.

Disadvantage: circumference of the imaging cylinder is generally smaller than the image-length; magnetic pattern is not sufficiently stable to ensure constant print quality.

The magnetographical imaging occurs via an imaging system with micro-magnet heads. Then the magnetic toner is applied, which is fused in order to attain a permanent image.

The materials on the imaging cylinder surface and the fused toner have to be conditioned so that they are suitable for offset printing. The image is transferred via the blanket cylinder onto the paper using dampening solution and inking up with offset inks.