Snagged a razor off Ebay that came in a case with a dispenser of Gillette Blue Blades (from the looks of it, they're carbon steel). There are several still in the dispenser. Are they safe to use or just a collector's item?
Hmmm.....not good. And here I thought all old Gillette blades were supposed to be awesome!
The Stainless ones are. Carbon looses its edge in time.
It's also my understanding that the un-coated carbon steel blades provided for a pretty rough shave even when new.
Gillette's marketing during the time period when they first introduced DE razors was "No Stropping, No Honing", they made no mention of getting the best shave ever.