Month: November 2015
DI Press – Presstek 52DI® Digital Offset Printing Press
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DI Press – Presstek 52DI® Digital Offset Printing Press
Presstek 52DI is among the most efficient, productive and profitable digital offset printing presses ever brought to market in the 52cm landscape format size. This highly automated four-color digital offset press consistently produces sellable sheets in approximately 10 minutes with up to 300 lpi and FM screening on a broad range of substrate thicknesses up to 20pt, increasing capabilities, throughput, and profitability. Job profitability is 13 percent higher on a DI compared to a conventional press, and compared to a toner-based digital device, the DI press saves 50 percent on average per letter size page. The Presstek 52DI has a maximum sheet size of 20.47 x 14.76 inches and produces up to 10,000 sheets per hour.
A Smarter Way to Print: High Quality and Environmentally Friendly Digital Offset Printing
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DI ® Press TechnologyA Smarter Way to Print: High Quality and Environmentally Friendly Digital Offset Printing DI ® printing is the process of sending a digital file directly to a digital offset press. This process eliminates the production steps associated with film-based or other offline platemaking. Presstek DI presses allow printers to be more competitive in a market that continually demands faster turnaround time and shorter press runs at lower costs—without sacrificing quality. DI is an enabling process brought about by the interaction of three core Presstek technologies—laser imaging, thermal digital media, and a unique press design. ProFire Excel ImagingProFire Excel, Presstek’s latest generation laser imaging technology, delivers exceptional image quality while dramatically reducing the possibility of moiré patterns in standard screen rulings. Fine details, color fidelity, minimum screen values, and large solids are produced with results that meet the most demanding offset printing needs. ProFire Excel easily supports screen rulings up to 300 lpi and FM (stochastic) screening. ProFire Excel combines all of the imaging components—infrared laser diodes, laser drivers, data electronics, and motion control— into one compact system. The foundation of ProFire Excel is a single image data board that controls the laser diodes. Each diode contains four uniquely addressable, 16-micron beams for high reliability, unmatched accuracy, and high-resolution imaging. Thermal PlatesPresstek’s DI plates are environmentally friendly waterless plates that provide more consistent color, larger color gamut, better color saturation, lower dot gain and more detail. Without the use of fountain solutions there are fewer variables and printing is cleaner—both operationally and on the sheet; plus there is no ink/water balance to manage. Presstek DI presses set the standard for digital offset printing by combining the high quality and versatility of offset with the automation and speed of digital printing. Presstek’s ProFire Digital Media is a key component of this superior performance and productivity. The combination of Presstek’s ProFire Digital Media and ProFire Excel imaging technology provides an optimized plate/laser system that yields the highest quality offset printing. ProFire Digital Media is designed to work as a system with the laser imaging, ink-profiling, and plate loading features of Presstek DI presses. In conjunction with ProFire Excel imaging, ProFire Digital Media allows for a 16-micron imaging spot and supports up to 300-line screen and stochastic (FM) screening— with the push of a button. The advanced imaging features of ProFire Digital Media result in superior rendering of details using any screen ruling—from highlight areas to shadows. Minimum screen values and subtle tonal transitions reproduce accurately and consistently. ProFire Digital Media reduces waste, saves time, and meets the most demanding quality requirements on runs up to 20,000 impressions. Presstek DI plates are manufactured with an ink-accepting polyester base layer, a middle layer of titanium oxide, and a top layer of silicone. During imaging, the heat from lasers removes the top two layers of the plate, exposing the ink receptive polyester layer. Areas that remain covered with the top layer of silicone will repel the ink. Unique Press DesignPresstek DI presses use Presstek’s Zero Transfer Printing (ZTP) process. With ZTP all four colors are laid down onto the sheet without any sheet transfer between colors. ZTP provides:
A satellite V-shaped 5-cylinder system consists of two sets of double-diameter blanket cylinders and plate cylinders which rotate around a triple diameter impression cylinder. Each sheet is tightly held by the impression cylinder grippers and rotated twice without being transferred for precise four-color printing. The large diameter of the impression cylinder reduces paper curling as well as damage to the substrate.Click here to see it work .
How does Zero Transfer Printing work?
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Control during the print run
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Control during the print run
Colour control is achieved using a densitometer or scanner to measure the control strip. Measurement results for each colour tell the printer whether to give more or less ink in a certain area. The print must match the original or the fixed system data as closely as possible. Sample prints are scanned and analysed against the original data. By fine-tuning the ink supply, the results come closer and closer to this colour model. Settings can then be stored in integrated software or recorded on computer tapes for optimal print and re-print runs. As soon as the prints satisfactorily match the original and the colours register perfectly, the real print run starts. However the press operator continually takes sample sheets to monitor and maintain ongoing colour and register throughout the run.
Offset printing technology – basic
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Offset printing technology – basic
Offset printing is the most commonly used method today, and has many advantages over other forms of printing, especially when we need high and consistent image quality.
This is a process used for printing on a flat surface, using plates. An image is transferred to a offset plate which is chemically treated so that only image areas (such as type, colors, shapes and other elements) will accept ink. Water and ink is applied to the plate. Because of the chemical treatment, ink only “sticks” to the image areas, which reject the water. Areas without images reject the ink. The images with ink are transported then from the plate to the surface of blanket. The task of printing blankets that are made of special multi-layer rubber is to convey the image or illustration to the paper and this is repeating on every cardboard that passes through the printing machine. When we print full color job the cardboard is overprinted four times on four separate printing units with different colors.
Offset printing uses the process colour or four colour known as CMYK.
- ‘C‘ stands for Cyan (a colour in the blue/green spectrum),
- ‘M‘ stands for Magenta (a colour midway in the red/blue spectrum),
- ‘Y‘ stands for Yellow and
- ‘K‘ stands for Key (the black key plate).
Taman Bacaan Masyarakat (TBM)
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Sumber Ide:
Taman Bacaan Masyarakat (TBM)
Taman Bacaan Masyarakat (TBM) sering dipandang sebelah mata. Ketika kami menawarkan beberapa pihak memulai pelayanan TBM, respon yang kami dapat adalah pandangan keheranan. Bahkan mereka lalu memberi saran agar kami mendirikan Pendidikan Anak Usia Dini (PAUD) saja.
TBM sebenarnya adalah jalan masuk ke masyarakat akar rumput. Mendirikan TBM sama seperti menjejakkan kaki masuk ke masyarakat akar rumput. Sekaligus TBM adalah tangan untuk menarik kelas menengah turun ke masyarakat bawah.
Memang ada banyak jalan untuk masuk ke masyarakat akar rumput. Pada umumnya pekerjaan yang dilakukan tidak permanen (temporer, hanya berdasar event), sektarian atau biaya tinggi. Kegiatan yang paling umum adalah bakti sosial, pelayanan kesehatan, pendirian koperasi atau unit usaha, sekolah dan pelayanan kesehatan. Ada juga yang mendirikan LSM. Semua itu baik dan dibutuhkan masyarakat.