Hemp rope vs. paper on a blade

[Leu Custom]

i'm also thinking that everyone is talking about knives with edges that are quite thick in the 30-40 degree range as a secondary edge which i'm guessing no burr would develop as there is a whole lot of meat behind that blade edge.

 

[Cliff Stamp]

i can only feel it with my thumb nail as I drag it over the edge.

Do you feel the edge biased towards the flat (non-ground) side of the blade. Does it still shave smoothly on both sides (left/right arms). What exactly do you feel with your thumbnail.

-Cliff

 

[Leu Custom]

Cliff,

Generally I will drag my thumb nail across the blade edge with my finger parallel to the edge. I know it's sharp because it's actually cutting into my fingernail. You can't actually see the "wire edge"...but it's there.

I realize this only happens on my chisel grounds blades and the "wire edge" or "burr" or whatever it is, doesn't develop on my double ground blades as i'd expect it not to with a edge that is actually thicker as it's ground on both sides. perhaps these are what chisel ground blades do. I'd image a blade made by RJ martin or snody would do the same chisel ground and as sharp. Sharp enough to split hairs sharp. The edges i'm talking about chisel ground are ground at 20 degrees whereas the double grinds are 12.5degrees on each side with a 25 degree of total cutting edge. I sometimes do 15 degree chisel grinds.

Generally speaking when you hand sharpen a blade with stones, can you see the wire edge that forms on the other side of the blade either double or chisel ground?

Wish I had a microscope!

 

[Cliff Stamp]

I realize this only happens on my chisel grounds blades and the "wire edge" or "burr" or whatever it is, doesn't develop on my double ground blades as i'd expect it not to with a edge that is actually thicker as it's ground on both sides.

There is nothing limiting double ground blades to be more obtuse, I have some for example ground at 5 degrees per side. It sounds to me like a edge bias issue, how exactly do you sharpen the knives.

Generally speaking when you hand sharpen a blade with stones, can you see the wire edge that forms on the other side of the blade either double or chisel ground?

It depends on the steel mainly, some will burr stronger than others. With a 10-20X magnifier you can see edges close enough to handle all burr issues. With a careful eye and just light you can in fact handle most problems. Just look for either a reflection or shadow. Rotate the blade under light and see if there are any irregularies on the side of the edge.

-Cliff

 

[65535]

Try making a micro bevel on the flat side to remove the burr after you to the bevel. The key is light pressure to remove the burr without actually affecting the edge. Like getting rid of flashing on plastic tree molded parts.