How many shaves per blade

FYI below of various type of razors (I have too many) along with maximum shaves per blade in my den.

Astra Superior Platinum: 5 or 6 shaves max.
Feather Hi-Stainles: 3 or 4 shaves max.
Gillette Nacet: 5 or 6 shaves max.
Gillette 7 O'Clock Green Super Stainless: 4 or 5 shaves max.
Gillette 7 O'Clock Yellow SharpEdge: 5 or 6 shaves max.
Gillette Silver Blue: 5 or 6 shaves max.
Gillette Sputnik: 4 or 5 shaves max.
Kai Stainless Steel: 5 or 6 shaves max.
Ladas Super Stainless: 3 or 4 shaves max.
Personna Platinum (Israeli Reds): 5 or 6 shaves max.
Perma-Sharp Super: 7 or 8 shaves max.
Polsilver Super Iridium: 7 or 8 shaves max.
Rapira Platinum Lux: 4 or 5 shaves max.
Rapira Voskhod: 3 or 4 shaves max.
Super Max Blue Diamond Platinum Coated: 2 or 3 shaves max.
Wizamet Polsilver Brown: 5 or 6 shaves max.
German Wilkinson Sword: 4 or 5 shaves max.

thanks for sharing this
 
My usual DEs are Polsilver Łódź and Super Iridium then occasionally Gillette Silver Blue, I get 4-5 good shaves from these, I could probably get a couple more but there would be a lot of touching up. Recently I've been using Indian Gillette 7 o'clock Permasharps, and they are living up to their name, I've taken them up to 8 before I felt they were past their best.

Best ever for longevity though are Kai Captain single edge, well in to double figures in my Mongoose. A great blade.
 
3 or 4 shaves, each shave being 3 pass + touch ups.

My facial hair grows quickly and i get quite tough stubble - Derbys et al don't quite cut it (see what i did there ?) so i use Astra SP usually or Feathers occasionally. I tend to shave every day.

After 3 or 4 shaves i can feel Astra SP starting to loose their edge a little - they are still ok for shaving, but don't slice through it with the same ease. I prefer the Astras for their consistent ease of shaving.
 
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