It did not really have a name. It was the mummification process.
helps it preserve longer
Ancient Egyptians would use molten resin to stuff this material in the mummy's body during the process of mummification.
solNitron was used in the mummification process. Certain organs (like the liver) were removed beforehand, embalmed and placed in canopic jars to be buried with the mummy.
Mummification is the preservation of the soft tissue of a body by any means, natural or artificial. Embalming is the deliberate preservation of a body for any period of time. This includes what we commonly term "the process of mummification" in Ancient Egypt
mostly desiccation, but the Egyptian priests that handled it had special rituals for each organ (e.g. the brain being just useless fat was sucked out the nose and discarded, most of the rest of the organs were removed wrapped in special linen bags with specific spices and reinserted.)
it is mummification
The mummification process is not quite complete.
The word 'mummification' is a noun, a word for a process; a word for a thing.
Oil then resin.
Okay, 'The ancient Egyptians used the mummification process to create a mummy."
Yes, the process was expensive.