I started with 8 oz of raw Romney.
I washed it carefully with Dawn to get the as clean as I could. Then I used my Fricke flick carder to prep the fibers.
Spun some singles...
Plied it onto my big bobbin... Soaked it, dried it, twisted into a skein.
In the end I had a 5 oz skein of yarn. So that's 3 oz of grime and dirt and seconds flicked out during the prep process.