For example, one printer I saw used laser sintering (sp?) Basically you have a big box of powder which is shot at by a laser, solidifying the powder at the loca

For example, one printer I saw used laser sintering (sp?) Basically you have a big box of powder which is shot at by a laser, solidifying the powder at the locations the laser hits it. Afterwards the remaining powder is sucked out and the object remains. The results is a much more solid construction than what you get with 'shooting' small blobs of molten plastic like a makerbot does. But the process is a lot more messy, and a lot more dangerous too.