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The cover printing problem consists in designing the composition of impression grids, and determining the number of times each grid is to be printed in order to fulfill the demand of different book covers at minimum total printing cost; the latter comes from three fixed costs: for printing one sheet, for producing one plate, and for composing one impression grid.
Also, dividing the splint into two or three parts helps reduce the total printing time if multiple 3D printers are available.
The first model (real-size model, designated B100) was printed in a Paragon device (Rapid Technologies, Middleton St George, UK) by using selective laser sintering; the total printing time was 24 h.
Then, a model with half the original size (designated B50) was printed by PLA extrusion in a ZMorph 2.0 S printer (z-layer: 0.1 mm, path width 0.4 mm); the total printing time was approximately 10 h.
Although the splint was divided into several parts occupying equal volumes, differences in the shape and consumed support material of these parts were observed to cause minor inconsistencies in the total printing time.
His publications reached a total printing of 36 million copies.
Similar(51)
Total print revenue fell by 18% to £31.7m in the year to the end of September.
In 2011, America's 148,424 self-published print books accounted for 43% of the total print output, Bowker said.
The company said publishing revenue is down 10%; within this total print revenues fell 12% while digital climbed by 11%.
By 2010, total print ad income had been sliced in half, to $22.8 billion, with a meager $3 billion online.
When executives at Wiley learned that the first printing had sold out within three hours, they ordered a second printing immediately, bringing the total print run to 25,000.
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