Princeton Blue Double Edge Razor Blades

[bomber.79]

I have recently acquired some Princeton Tempered Blue Steel Razor Blades. These are vintage razor blades in the USA. Has anyone ever encountered or indeed used these?

 

[SpeedyPC]

Have fun shaving with your blades above bombardment

 

[borked]

Not those specific blades yet carbon DE blades are different from 'modern' DE blades
They require sharpening before/after user upon a special hone, need to be stored in a medium that prevents rust and also are thicker so can affect the geometry of shave angle.

 

[bomber.79]

Thanks for the info @borked, that's good to know