=== Why Anodize? ===

[[File:AnodizedPanel.jpg|thumb| Black Anodized Panel used in Pratham Satellite]]

Black inorganic anodized aluminium alloys are used for managing passive thermal control on spacecraft and for avoiding stray light in optical equipment. <br \>

Due to the vacuum of space, thermal regulation of satellites is passively managed by radiative exchange between its external surfaces and the environment. Satellite temperatures in a space environment are often passively controlled by thermal properties of suitable surfaces, i.e. having convenient solar absorptance (α) and emittance (ε). <br \>