It was used to tan leather, too.

Fulling, urine collection, the Roman urine tax, Titus Flavius Vespasianus, and the Flavian dynasty. That link sent me on quite the trip down the Wikihole.

Edit: Fuller, Tucker, and Walker are all surnames suggesting your ancestors worked in piss.

There was a dude that used to frequent the bar I worked in with the last name Fuller. We used to say he was fuller shit because he wouldn't shut the fuck up. If we saw him coming we would run, because the first bartender he started talking to was going to be stuck there for at least two hours listening to him ramble about his whisky collection.

The man was a hoarder and an alcoholic, once bragged about how he hid $30k worth of whisky uber his baby's crib so his wife wouldn't find it. And that's basically the gist of his rants, but they were unending.

This news put a smile on my face.

Fuller was the name of the kid who seemed proud of pissing the bed in Home Alone.

Stale urine, known as wash or lant, was a source of ammonium salts and assisted in cleansing and whitening the cloth and having its fibers intertwined.

Doesn't seem to help in 'softening' or 'making it more full'?

Problem with that is that she might be aiming primarily for reversing greying and that… it will not do.

Use your neighbors Urine then.

That seems like such a brutal job.