My Lesson in INFI

Adding to what Justabuyer has already said, in my noobiness, I was having issues with getting a Rat as sharp as I wanted it. When I saw this thread, I thought I'd give the old sandpaper and convex edge thing a try. Long story short...it worked like a charm!! Thanks, Justabuyer!!!!
 
Nice job sharpening! I rarely go to that much work. The last time I did, I loaned it to a friend who proceeded to cut himself to the bone on his left index finger! INFI sure does get scary sharp! As Jerry says " It screams" :)
 
This is not a Busse Blade. INFI is much EASIER to get to this point. I post it here because there has been some interest in this thread about pushing INFI edges to extreme sharpness.

CPMS30V like this blade is much more difficult to sharpen than INFI in fact the difference is night and day. You INFI freaks don't know how good you have it. Anyway...this is a human hair shaved in half but not cut all the way through.... Nothing but sandpaper and leather.

splithair.jpg
 
Hey JAB, I had to bring this back up, as this thread is amazing, and I have a small ding or chip in my FBM, and want to try out a convex edge on it....

Quick question... I used Wikipedia to find what a convex edge looks like, and it appears kind of curved to the edge... is this something that you need to incorporate into your sharpening technique??

Please let me know, I'm dying to try this out, but am in fear of ruining my baby... :p


I'm more than happy to put the time into this, just that the tuts I've read don't mention about turning the blade as you drag...


Cheers bud,

Al
 
Not really every edge sharpened by a human being is going to be convex to a degree as we are not perfect.

Convex sharpening simply seeks to live in harmony with the unavoidable natural tendency to produce convex edges.

If you use sand paper on a surface that has some give to it the convex edge will form natually.

In time you will understand there is no spoon.



hawkinsa21 said:
Hey JAB, I had to bring this back up, as this thread is amazing, and I have a small ding or chip in my FBM, and want to try out a convex edge on it....

Quick question... I used Wikipedia to find what a convex edge looks like, and it appears kind of curved to the edge... is this something that you need to incorporate into your sharpening technique??

Please let me know, I'm dying to try this out, but am in fear of ruining my baby... :p


I'm more than happy to put the time into this, just that the tuts I've read don't mention about turning the blade as you drag...


Cheers bud,

Al
Click to expand...
 
Justabuyer said:
Not really every edge sharpened by a human being is going to be convex to a degree as we are not perfect.

Convex sharpening simply seeks to live in harmony with the unavoidable natural tendency to produce convex edges.

If you use sand paper on a surface that has some give to it the convex edge will form natually.

In time you will understand there is no spoon.
Click to expand...

HAHAHAHAHA!!! :D :D :D

.
 
Justabuyer said:
Bussetip.jpg

Bussetip2.jpg

Busseedge.jpg

This last one shows the smoothing of the coating and seems to show scratches on the edge polish... trust me that is not the case.
Bussesmooth.jpg
Click to expand...


Justabuyer: The edge looks very nice. That is about how much I thin my knives out. I do have a question though. How long did you strop the blade? (I'm talking about with the compound loaded strop, not the sandpaper.) If I strop to a mirror finish with 2000 grit chromium oxide compound that would take me forvever, and I think I would loose the edge due to over stropping. Did you get it that shiny with the sandpaper? And then strop it just a few times? Thanks-Jeff

BTW: The edges sure do look funny ground that far back, but they are worth it!
 
Yeah did the hard part with the sand paper. It already looks mirror bright before the loaded strop.


I also strop naked in the front porch. That adds a element of naughty excitement.
 
Being a total noob with regards to sharpening knives, this has been very interesting to read about. My big question is on the 2x4/Leather/Sand Paper set up. Any specific thickness on the leather? Should I start at a specific grit and move up, or just go at it with the target grit I want? Also, I am sure getting a consistent angle takes practice. Any pointers?

Thanks all!
 
That is a great looking knife for a user!
I recently got a cheap belt sander and a leather belt.
WOW! Power stropping rocks!!!!
 
steelnut said:
That is a great looking knife for a user!
I recently got a cheap belt sander and a leather belt.
WOW! Power stropping rocks!!!!
Click to expand...


LOL!!!! :thumbup:


BTW - how much was your belt sander?? I've always thought they were really dear, but haven't actually looked into getting one...
 
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