Powell's Hair being "Filed?" What's THAT about?!

[Jenny]

I've been searching too... and I "got nuthin'" so far. Let me ask a friend of mine who know quite a bit about Victorian vocabulary; however if you expert ladies and gents don't know what "filing hair" is, I am not sure she would either.

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Wait! I might have found something! My friend immediately said this about "filing hair" in the Victorian era: "It's like the razor cut today. Open blade, slicing hair. It's messy but did the job."