In this second video, I continue to demonstrate the Nubatama 180 grit Waterstone. I do this by again damaging the edge of a produce knife by hitting it on the spine of a Dexter-Russell Cleaver.
I continue soaking the stone and checking porosity. I demonstrate how to detect chips with my fingernail. The stone is fairly porous. This video is a continuation of the first part interrupted by a phone call. I include both videos to better understand the stone's porosity characteristics rather thanstart with just this video and it be the one video with a presoaked stone with no explanation.
After an initial soaking, the stone stays fairly well saturated. I begin repairing the chips and am pleasantly surprised by the RAPID rate of metal removal ("metal eater"). Nearly all of the chips are removed in just a few strokes! I continue to remove some more metal to remove a remaining bigger chip and to even out the bevel.
Overall initial impression is that this is an aggressive coarse stone that rapidly removes metal. Porous, requiring a couple minutes of presoaking. Generates a moderate amount of mud which aids in more rapid action.
An excellent stone for anyone who needs to do repair and to establish an edge.
I picked up this stone to make edge re-profiling go faster. This stone makes short work of S30V steel. I can not change the angle of an edge in a few minutes vs 10 to 20 minutes with a stock EP 220 stone.