For an industry rife with chewy buzzwords such as "the Internet of things" and "augmented reality," it's refreshing to come across a concept as intuitive as "3-D printing."
A 3-D printer is just what it sounds like: a printer that prints in three dimensions -- or, more accurately, in a series of thin layers laid out according to a computer program.
Three-D printers put the resources of a manufacturing plant within the comfort of your home or office.
While some companies, such as MakerBot, sell affordable 3-D printers directly to consumers, others, such as Shapeways, offer 3-D printing services to engineers, designers and architects who can't afford an industrial-scale machine.
It's the professional realm that has shown the most amazing possibilities. NASA recently fired up a rocket injector made entirely from 3-D-printed parts.
Researchers from North Carolina State University have developed a liquid metal that could be used to print circuit components. Last month, a team in China successfully printed living kidneys. And, most alarmingly, plastics can be used to print guns.
That's just the beginning -- everything from guitars and auto bodies to bikinis and bionic ears have been built using 3-D printers.
On a professional level, 3-D printing affords entrepreneurs a more cost-effective option for manufacturing.
But the real test could come next year, when a number of key patents expire. Once that happens, expect a flood of cheap 3-D printers to hit the market, bringing more affordable manufacturing options to cash-strapped designers and entrepreneurs.
While the average consumer currently has little use for a 3-D printer, these machines could potentially democratize manufacturing, much as the Apple II did for computers. Homeowners might be able to print mugs, doorknobs, jacket hooks and other household items on a whim.
But Nick Allen, founder and director of 3D Print UK, is skeptical. As the CEO of a 3-D printing company, he is a firm believer in the future of 3-D printing.
But he says that the practicality of the technology is being overshadowed by its potential.
"It complements but does not compete," he says. "The processes are not going to get a huge amount faster, as unlike computers, which they are often compared with, they have to work with the chemistry of the materials that they use."
It's the materials that many advocates overlook when making projections for the market. Unlike, say, an injection mold, a 3-D printed object is structured layer-by-layer, like a very tiny brick wall. But compare the strength of a brick wall with that of concrete: The latter will always be stronger. "The part you print won't be as good as the part you order," Allen says.
In the 1990s, when personal printers first took off, advocates imagined a future with a printer attached to every laptop , and a centralized household printer that delivered your morning newspaper and snail mail. That never happened.
Could a personal 3-D printer in every home also be wishful thinking?
Allen suggests that 3-D printing at home won't necessarily be faster than buying something online.
"We now live in a world where we can get something to our door by 9 a.m. if we order it at 5 p.m.," Allen says. "Printing takes time."
In 2011, global 3-D printing sales were $1.7 billion, according to consultant Wohlers Associates.
That figure is expected to reach $6.5 billion by 2019 -- considerably less than the $99 billion raked in by the smartphone market during its coming-of-age in 2010, according to Strategy Analytics.
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