Space manufacturing info by chemical Man

Space manufacturing is the production of manufactured goods in an environment outside a planetary atmosphere. Typically this includes conditions of microgravity and hard vacuum. Manufacturing in space has several potential advantages over the Earth-based industry.

The unique environment can allow for industrial processes that cannot be readily reproduced on Earth.
Raw materials could be lifted to orbit from other bodies within the solar system and processed at a low expense compared to the cost of lifting materials into orbit from Earth.
Potentially hazardous processes can be performed in space with minimal risk to the environment of the Earth or other planets.
Items too large to launch on a rocket can be assembled in orbit for use in orbit.
The space environment is expected to be beneficial for the production of a variety of products. Once the heavy capitalization costs of assembling the mining and manufacturing facilities is paid, the production will need to be economically profitable in order to become self-sustaining and beneficial to society. The most significant cost is overcoming the energy hurdle for boosting materials into orbit. Once this barrier is significantly reduced in cost per kilogram, the entry price for space manufacturing can make it much more attractive to entrepreneurs.

Economic requirements of space manufacturing imply a need to collect the requisite raw materials at a minimum energy cost. The economical movement of material in space is directly related to the delta-v or change in velocity required to move from the mining sites to the manufacturing plants. Near-Earth asteroids, Phobos, Deimos and the lunar surface have a much lower delta-v compared to launching the materials from the surface of the Earth to Earth orbit.