Thread: usb microscope

latest pics. this is one of my vintage razors, by hartford cutlery, after 1 shave. bad chipping going on. the honing was: king 1000 grit, diamond 8000 grit, jasper, chrome oxide on maple, bare leather. what’s going on here?

as found

Originally Posted by bridger

latest pics. this is one of my vintage razors, by hartford cutlery, after 1 shave. bad chipping going on. the honing was: king 1000 grit, diamond 8000 grit, jasper, chrome oxide on maple, bare leather. what’s going on here?

as found

Did you inspect the edge at each honing stage to know it is a post shave problem. I think the 8k diamond is likely the culprit . Altho it is 8k the scratches cut deep & deep scratches can chip out. Previous pitting may also have weakened the steel.

Originally Posted by onimaru55

Did you inspect the edge at each honing stage to know it is a post shave problem. I think the 8k diamond is likely the culprit . Altho it is 8k the scratches cut deep & deep scratches can chip out. Previous pitting may also have weakened the steel.

I did inspect at each stage. the jasper cuts slow, so it's possible that I didn't get to the bottom of the 8000 scratches before going to chrome oxide. next honing I'll substitute .5 micron diamond for the jasper, then chrome oxide. these are down near the limit of my scope to see- the chrome oxide just makes it shinier as far as the scope can resolve. I think that the scratches below about 1 micron are sub-pixel wide so I can't see them.

previous pitting is a definite possibility with a vintage blade.

When I used DMT's I found many vintage razors just couldn't hold together at the edge without chipping. Let us know how the .5 micron works.