One of the claims that has induced the most skepticism of the project is that can fit such complicated mechanics in a desktop-sized frame: there are four different color cartridges (CMYK, or cyan, magenta, yellow, and black, which can be mixed together to form any color) and a cartridge for a supporting material. I watched it start printing out an object (a small, pink piece of machinery), and then asked Duma how they'd managed to pack the cartridges. He told me the filaments were treated with an "additive." I asked what the additive was. "We're not disclosing that at this time," he told me. This was a common refrain. I asked approximately how many printers they'd pre-sold, and Warner told me that was not being "disclosed," although it was "a lot." The reason they'd missed the October deadline was due to problems discovered late in stress testing, although the specifics, beyond the fact that there were issues with the chip set and case, weren't being disclosed.