Thread: Edge durability how about expert opinions?

I suspect within the respective countries of origin the razor makers bought the steel from just a few outfits and the steel is basically the same (considering carbon and stainless). Depending on how the blanks were processed meaning tempering and such, is one big difference which could account for differences from razor to razor and don't forget most vintage blades are at least 50 years old or more and we really have no clue as to what has happened to them over the years. Unless we have a razor in it's original sealed wrappings we can only guess. Even a NOS could have been stored in a hostile environment. I don't know if we realize how the steel can be altered depending on how kind the years have been to it.