Anandakanda 2.7.71

2.7.71

etatsyāt sattvasindūraṃ rugjarāmṛtyunāśanam /
<abhrakasattvasindūravidhi (3)>
tatsatvaṃ ravakānhitvā lohakhalve subuddhimān //

This will become vermilion-like ash of the essence, destroying disease, senescence, and death.
<Procedure for red vermilion-like ash of mica essence (3)>
Having removed the coarse grains of that essence, a wise person in an iron mortar