In the second stage of the production process, the now black fibres go through the process of carbonization, in which they are processed through a series of furnaces, from low to high temperature, to 2,000° C (in more sophisticated carbon fibre production, there would be a third, ultra-high-temperature furnace, which is subject to stringent export controls).
In the second stage of the production process, the now black fibres go through the process of carbonization, in which they are processed through a series of furnaces, from low to high temperature, to 2,000° C (in more sophisticated carbon fibre production, there would be a third, ultra-high-temperature furnace, which is subject to stringent export controls).