Scientists have produced a 3D printing machine for use in zero-gravity, the first of its kind in China, which astronauts will be able to use while on space missions, according to the China Aerospace Science and Technology Corporation (CASTC) on December 8.

Additive manufacturing, another term for 3D printing, is the processes in which three-dimensional objects are made through the layering of material. It is advancing rapidly and is being increasingly used for industrial purposes.

The machine is capable of printing optical lens brackets, components for nuclear power testing equipment, impellers used in aircraft research and special-shaped gears used in automobile engines, said Wang Lianfeng, a senior engineer with CASTC Shanghai's research arm.

The machine, which uses both long-wave fiber and short-wave carbon dioxide lasers, can produce items under 250 millimeters long out of stainless steel, titanium alloy and a nickel-based superalloy.

"The products made will have to be tested thoroughly, due to the strict quality requirements for aerospace products," said Wang, adding that the prospects of 3D printing is promising.