As a noun ashing
is an analytic procedure in which a sample is heated in a furnace to leave a residue of ash, either to determine the gross mineral content, or as a preparation for further analysis.
As a verb fashing is
present participle of lang=en.
ashing
English
Noun
(
en noun)
(chemistry) An analytic procedure in which a sample is heated in a furnace to leave a residue of ash, either to determine the gross mineral content, or as a preparation for further analysis