If you get the C12 then be sure to lap it. Mine was pretty wavy.
Originally Posted by fijiblue
I prefer lapping film now... but I have the attention span of a squirrel.
12 5 3 1 (I think) is being sold on B&B
I got the #2 pack from Bestsharpeningstones. Costs more but the film is backed and a bit sturdier to my estimate. Number 2 pack is 9, 5, 3, 1, .3. However, you can buy quite a bit of the non-backed film for the price of the backed stuff.
Just rotate the blade through the different sheets to the smallest grit. I used 30 strokes for good blades. 60 strokes for rebuilds. Occasionally had to revisit the sequence but not often. Some prefer to NOT use the .3 micron sheet. I like it.
My record for one segment of film (cut a sheet into 3 strips/segments) was 52 razors. All needed minor touch-up. However, I then tangled with some blades from hell and my average went way down.
Inventor of the world's first safety vibrating Kamisori with night light. Go to http://badgerandblade.com/vb/showthread.php/299465-A-milder-Kamisori: Inventor of the Weckisori - (thanks sychodelix)