This is the slight hollow grind I have observed on my IJ knife.

This is the IJ 1244 after my latest efforts to flatten and zero grind it. I did this work on the Fallkniven DC4 diamond/ceramic stone and loaded leather strop.

You can see the small area near the plunge that is still hollow. It will take a few more sessions (or years) to work to an absolute flat. You can also see a nick in the very tip…sort of making it a stronger point so I have not worried about it.



You can also see the slight gap with the tang enters the bolster. Thin epoxy would be a good idea...just one that I have not yet got around to.

The other side hollow is actually a bit bigger.



My IJ came with a slightly hollow “flat” and a secondary edge. I had worked it to a nearly flat scandi on water stones and ceramics long ago, but this session on the DC4 really revealed that it is still far from flat. It is smoking sharp now though with a slightly convex edge done on the green compound loaded leather strop.