PA State Law does not ban the carry of razors. It does not [for the most part] ban the carry of knives. Daggers [double edge blades], switchblade/gravity knives and swords are regulated.
Using Killadelphia as the example of "local/jurisdictional laws" - Philly makes no distinction between a knife or a grooming appliance. Anything that cuts [to them] is synonymous to 'knife' - and the law applies. To that end, you and I agree.
My response was to DocT's response [post #7]. Doc asserted that carrying a razor outside the home was illegal and I simply replied that's up to the jurisdiction. That still holds true...and is up to the individual to seek out the appropriate laws for their area. That's all I said and all I meant...nothing more or less.
I still think you don't understand the point. I'm also interested in which states specifically ban razors, but not other knives.