Related to this specific case, previous skate tech said that he has used Prosharp ceramic stone to remove burrs after the hollow grinding. My theory is that he has used it a bit like V-stick sharpener. If you tilt the deburring tool too much and use to much force, metal will be mangled on the groove side. This is mine #1 theory why there was clear visible polishing in chrome removal and why burrs at hollow side existed only in those areas. I have also tried to use microscope, but is extremely difficult to get good image from the shiny surfaces.
I believe you made your conclusion from the photo where I have made one light grinding pass. Even the edges were unevenly grinded, that was not what I tried to demonstrate. Reason my blue ink still exists in one side of the blade comes from the fact that I could not get blade 100% same height as previous grinding at first grinding pass. @SterlingSnyder-ef5yc has already more experience form the blades sharpening's, so his analyses were very good and they could cause burr inside the hollow. However I have different theory what caused burr.
Yes, there was burr inside the hollow and yes, wheel has not probably dressed enough often. Its also possible that wheel has been more coarse than mine or wheel has been dressed to cut more aggressively (fast dressing movement). These conclusions are most visible in the photo where I have made one light grinding pass. Worn wheel radial profile could be also root cause for the burr, but I believe there is some other reason for the burr. Its not shown so clearly in video, but burr did exists only in the area where we can see "polishing" in the chrome removal area. If burr would come from the wheel, I think the burr should exist in whole length of the blade. Burr didn't exist in the end of blade which is hardly even used, so my conclusion is that ice has not made deburring for the areas which are used all the time. Your analyses were good, but I have some other theory what has caused the burr.
I usually deburr inside and outside of the blade and verify with a microscope. I found hollow inconsistencies also a problem.
Related to this specific case, previous skate tech said that he has used Prosharp ceramic stone to remove burrs after the hollow grinding. My theory is that he has used it a bit like V-stick sharpener. If you tilt the deburring tool too much and use to much force, metal will be mangled on the groove side. This is mine #1 theory why there was clear visible polishing in chrome removal and why burrs at hollow side existed only in those areas.
I have also tried to use microscope, but is extremely difficult to get good image from the shiny surfaces.
the grinding area little bit off from the center of the blade, so the edges have different high
I believe you made your conclusion from the photo where I have made one light grinding pass. Even the edges were unevenly grinded, that was not what I tried to demonstrate. Reason my blue ink still exists in one side of the blade comes from the fact that I could not get blade 100% same height as previous grinding at first grinding pass.
@SterlingSnyder-ef5yc has already more experience form the blades sharpening's, so his analyses were very good and they could cause burr inside the hollow. However I have different theory what caused burr.
Is that burr to the inside of the hollow the result of a sharpening done with a poorly dressed wheel?
Yes, there was burr inside the hollow and yes, wheel has not probably dressed enough often. Its also possible that wheel has been more coarse than mine or wheel has been dressed to cut more aggressively (fast dressing movement). These conclusions are most visible in the photo where I have made one light grinding pass.
Worn wheel radial profile could be also root cause for the burr, but I believe there is some other reason for the burr. Its not shown so clearly in video, but burr did exists only in the area where we can see "polishing" in the chrome removal area. If burr would come from the wheel, I think the burr should exist in whole length of the blade. Burr didn't exist in the end of blade which is hardly even used, so my conclusion is that ice has not made deburring for the areas which are used all the time.
Your analyses were good, but I have some other theory what has caused the burr.