They are wet ground,through 3600 grit,using old equiptment from a bygone era (seriously ,just some old stuff from when I had a tool,and die shop along time ago.)It takes about an hour to do a blade(big Chopper) in poor condition,to EELL,little longer for one in very bad condition(lots of corrosion,wide uneven edge,spine wear)Hollow grounds dont take very long.Lots of grinding wheels various grits diameters/widths,and face profiles very messy work,but still fun sometimes.......Come Help,low pay,free tacos......Best Regards Gary

By the way this razor got sold