Search:

"The sorption materials included activated carbon containing 87% carbon and wood ash residuals containing 32, 27, 6, and 0.24% carbon, with surface areas of 520, 85, 74, 25, and 2.1 m2/g,...

I think that ash's abrasive properties come from it's composition, carbon, which is the same stuff diamonds are made of, also the stuff that gives toughness to the steel...

Nenad

Ash has definitely abrasive properties... Per advice of our regular honemaster Randy (Tuttle), that the ash was used in the past as a polishing substance, I decided to try it out when I was walking...