By the mummification of the corpse, the dead person was turned into a god. So bathing the corpse in natron, or sodium hydrate, oiling the corpse, or wrapping him in the mummy-bands is how he was transformed into the god of the universe
Von Franz argues that Egyptian mummification was a literally operative material theology in which chemical substances functioned as divine agents effecting concrete deification of the deceased.
, Psyche and Matter, 2014thesis