This page is part of the Interactive Guide to DE Razor Shaving.
What is it?
Every Safety Razor user saw those mysterious numbers on the corner of their DE blades at one stage or another. Many users already asked the question and many more will.                
Most of us are always asking themselves, what are they? Why do the manufacture print them? Is there a message, instructions or a guide for the user to put those numbers to good use? 
What are those numbers?Merkur Blade as 'I', 'II', 'III' and 'IV' or, like on the Sharp Stainless as '1', '2', '3' and '4'.
Some would also say they indicate edges have been honed. Again, this would be a reference for the manufacturer.
Not all blades have numbers, why?
So, how do we interpret them?There are no real message or instructions for the user on how those should be used at home. Disregard the numbers and use the blade as you wish. The numbers do not influence the shave and do not distinguish a "top side" versus a "bottom side" . There are no right or wrong way to use them with the shave. As long as your blade is securely and properly installed in the razor, there won't be any issues.
- ^Numbers on blades http://badgerandblade.com/vb/showthread.php/9364
- ^Blade Numbers? http://badgerandblade.com/vb/showthread.php/248965
- ^Numbers on razor blades http://badgerandblade.com/vb/showthread.php/242966
- ^Hey does anyone know what those numbers on the blades mean? http://badgerandblade.com/vb/showthread.php/210597
- ^Numbers on Astra blades http://badgerandblade.com/vb/showthread.php/195551
- ^Blade Numbers http://badgerandblade.com/vb/showthread.php/189787
- ^Numbers on blades http://badgerandblade.com/vb/showthread.php/178966
- ^Numbers on a Gillette Blade http://badgerandblade.com/vb/showthread.php/105263
- ^ What do the little numbers signify? http://badgerandblade.com/vb/showthread.php/172452
- ^What are the numbers for? http://badgerandblade.com/vb/showthread.php/164618
- ^Blade markings http://badgerandblade.com/vb/showthread.php/104341
- ^Probably a very STUPID question ... (Note, there are no stupid questions) http://badgerandblade.com/vb/showthread.php/118966
- ^Question about the Derby blades http://badgerandblade.com/vb/showthread.php/100371
- ^What do the numbers on the blade mean? http://badgerandblade.com/vb/showthread.php/94126
- ^what do the number on Derby blades mead? http://badgerandblade.com/vb/showthread.php/80591
- ^Derby Factoids http://badgerandblade.com/vb/showthread.php/26124
- ^The little numbers on the end of the blades http://badgerandblade.com/vb/showthread.php/189771
- ^Gillette Platinum blades http://badgerandblade.com/vb/showthread.php/4682
- ^Please S'plain.... http://badgerandblade.com/vb/showthread.php/160842
- ^Question? Purpose of numbers 1, 2, 3, & 4 on Blades http://badgerandblade.com/vb/showthread.php/242808
- ^DE blades: top or bottom? http://badgerandblade.com/vb/showthread.php/14283
- ^Flipping a DE blade to reuse? http://badgerandblade.com/vb/showthread.php/194781
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