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How to test the sharpness of a knife?
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How to test the sharpness of a knife?
What type of knife should I carry while rock climbing?Canadian Law with respect to knivesWhat are some simple tasks to teach knife safety?Tactical Folder vs traditional knife patterns for EDCHave mainstream knife steels improved in the last generation?Restore knife to factory sharp conditionAre there any non-legal advantages of a non-locking knife?How can I make an obsidian knife?How to sharpen a peculiar looking knifeHow to follow an existing angle when sharpening?
In order for knives to be useful, they need to be sharp. If I am sharpening one myself, how do I know when I am done?
What would be a simple easy test of whether a knife is sharp enough?
knives knife-sharpening
asked 11 hours ago
Charlie BrumbaughCharlie Brumbaugh
49.1k16138282
add a comment |
In order for knives to be useful, they need to be sharp. If I am sharpening one myself, how do I know when I am done?
What would be a simple easy test of whether a knife is sharp enough?
knives knife-sharpening
asked 11 hours ago
Charlie BrumbaughCharlie Brumbaugh
49.1k16138282
4
Note that after honing and using knives repeatedly in similar situations, you will start to learn when the knife is honed to the finest edge without testing. The way the knife feels against the steel tells you where it is in the honing process, once you've learned how that changes with sharpness. And also you can learn to feel the sharpness with a thumb, but it's hard to describe what it feels like - you just have to feel it and then try using the knife and then remember which feelings match with more sharpness. At home the ultimate test is a ripe tomato (IMHO).
– Todd Wilcox
3 hours ago
add a comment |
In order for knives to be useful, they need to be sharp. If I am sharpening one myself, how do I know when I am done?
What would be a simple easy test of whether a knife is sharp enough?
knives knife-sharpening
asked 11 hours ago
Charlie BrumbaughCharlie Brumbaugh
49.1k16138282
In order for knives to be useful, they need to be sharp. If I am sharpening one myself, how do I know when I am done?
What would be a simple easy test of whether a knife is sharp enough?
knives knife-sharpening
knives knife-sharpening
asked 11 hours ago
Charlie BrumbaughCharlie Brumbaugh
49.1k16138282
asked 11 hours ago
Charlie BrumbaughCharlie Brumbaugh
49.1k16138282
edited 10 hours ago
Charlie Brumbaugh
asked 11 hours ago
Charlie BrumbaughCharlie Brumbaugh
49.1k16138282
asked 11 hours ago
Charlie BrumbaughCharlie Brumbaugh
49.1k16138282
asked 11 hours ago
Charlie BrumbaughCharlie Brumbaugh
49.1k16138282
49.1k16138282
4
Note that after honing and using knives repeatedly in similar situations, you will start to learn when the knife is honed to the finest edge without testing. The way the knife feels against the steel tells you where it is in the honing process, once you've learned how that changes with sharpness. And also you can learn to feel the sharpness with a thumb, but it's hard to describe what it feels like - you just have to feel it and then try using the knife and then remember which feelings match with more sharpness. At home the ultimate test is a ripe tomato (IMHO).
– Todd Wilcox
3 hours ago
add a comment |
4
Note that after honing and using knives repeatedly in similar situations, you will start to learn when the knife is honed to the finest edge without testing. The way the knife feels against the steel tells you where it is in the honing process, once you've learned how that changes with sharpness. And also you can learn to feel the sharpness with a thumb, but it's hard to describe what it feels like - you just have to feel it and then try using the knife and then remember which feelings match with more sharpness. At home the ultimate test is a ripe tomato (IMHO).
– Todd Wilcox
3 hours ago
4
4
Note that after honing and using knives repeatedly in similar situations, you will start to learn when the knife is honed to the finest edge without testing. The way the knife feels against the steel tells you where it is in the honing process, once you've learned how that changes with sharpness. And also you can learn to feel the sharpness with a thumb, but it's hard to describe what it feels like - you just have to feel it and then try using the knife and then remember which feelings match with more sharpness. At home the ultimate test is a ripe tomato (IMHO).
– Todd Wilcox
3 hours ago
Note that after honing and using knives repeatedly in similar situations, you will start to learn when the knife is honed to the finest edge without testing. The way the knife feels against the steel tells you where it is in the honing process, once you've learned how that changes with sharpness. And also you can learn to feel the sharpness with a thumb, but it's hard to describe what it feels like - you just have to feel it and then try using the knife and then remember which feelings match with more sharpness. At home the ultimate test is a ripe tomato (IMHO).
– Todd Wilcox
3 hours ago
add a comment |
6 Answers
6
active
oldest
votes
Try to slice a piece of paper. A good sharp knife makes a clean cut. A dull knife makes either a ragged cut, or worse, just pushes the paper to the side. I like this article: https://www.fieldandstream.com/articles/hunting/2014/08/paper-cut-testing-blade-sharpness#page-4 and YouTube is full of videos of people showing off their knives via this test.
answered 9 hours ago
cobaltduckcobaltduck
3,4811030
2
Generally speaking though paper dulls knives very quickly and should not be done often unless you like to sharpen often.
– Nate W
1 hour ago
add a comment |
The back of a fingernail can be a good rough indicator while you're sharpening - see if it "catches" when you apply very gentle pressure at ~45 degree angle. This can also be a good way to check if the edge still has any dull spots.
answered 7 hours ago
tempest_coltempest_col
4145
add a comment |
Slice a tomato with very little pressure. This is almost always when I notice a knife needs sharpening, and the difference is profound.
answered 1 hour ago
OscarOscar
1211
New contributor
Oscar is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
You hold it edge up and then you let a silk scarf slowly float down over it. It should be cut neatly in half.
answered 5 hours ago
Tomas ByTomas By
21313
4
Ah yes, let me just whip out one of my collection of silk scarves that I keep for just this occasion and - what the? Kevin Costner and/or Whitney Houston!? What are you doing here?
– MikeTheLiar
3 hours ago
2
@MikeTheLiar if you're not traveling with your juggling kit, you're not prepared for the outdoors.
– Sdarb
3 hours ago
2
Juggling scarves is for amateurs. I juggle the knives. I know they're sharp when I wake up in the hospital.
– Oscar
1 hour ago
add a comment |
The best method in my opinion is one that must be learned, and involves moving your thumb across the blade, perpendicular to the blade not down it! It's very difficult to describe the feeling but if you do it on enough dull blades and sharp blades you will begin to be able to tell the difference.
One other thing I will do if im sharpening a knife for a friend or coworker to display how sharp it is is shave a couple hairs off the back of my hand. Lick your thumb, moisten the patch on the back of your hand and shave as you would with a straight razor. (You may want to wipe the knife clean after this.) Sounds weird but i do it because your average joe will know its extrememly sharp if you can shave with it and be careful with it.
One other test could be to attempt to very thinly slice a tomato, with and exceptionally sharp knife you should be able to get nearly paper thin slices with a light sawing motion.
answered 1 hour ago
Nate WNate W
1,499617
add a comment |
the best test for if your knife is sharp enough is to place it in a stream with the water flowing over the blade. If your knife is sharp, leaves and fish that flow past it will be cut, but if it's the sharpest, then only leaves will be cut but fish will be okay.
source: https://en.wikipedia.org/wiki/Masamune#Legends_of_Masamune_and_Muramasa
answered 4 hours ago
SdarbSdarb
1333
New contributor
Sdarb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
-1 A legend is no answer.
– Jan Doggen
3 hours ago
1
We're looking for stuff that works in the real world, not stuff that works in legends.
– Mark
2 hours ago
add a comment |
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6 Answers
6
active
oldest
votes
6 Answers
6
active
oldest
votes
active
oldest
votes
active
oldest
votes
Try to slice a piece of paper. A good sharp knife makes a clean cut. A dull knife makes either a ragged cut, or worse, just pushes the paper to the side. I like this article: https://www.fieldandstream.com/articles/hunting/2014/08/paper-cut-testing-blade-sharpness#page-4 and YouTube is full of videos of people showing off their knives via this test.
answered 9 hours ago
cobaltduckcobaltduck
3,4811030
2
Generally speaking though paper dulls knives very quickly and should not be done often unless you like to sharpen often.
– Nate W
1 hour ago
add a comment |
Try to slice a piece of paper. A good sharp knife makes a clean cut. A dull knife makes either a ragged cut, or worse, just pushes the paper to the side. I like this article: https://www.fieldandstream.com/articles/hunting/2014/08/paper-cut-testing-blade-sharpness#page-4 and YouTube is full of videos of people showing off their knives via this test.
answered 9 hours ago
cobaltduckcobaltduck
3,4811030
2
Generally speaking though paper dulls knives very quickly and should not be done often unless you like to sharpen often.
– Nate W
1 hour ago
add a comment |
Try to slice a piece of paper. A good sharp knife makes a clean cut. A dull knife makes either a ragged cut, or worse, just pushes the paper to the side. I like this article: https://www.fieldandstream.com/articles/hunting/2014/08/paper-cut-testing-blade-sharpness#page-4 and YouTube is full of videos of people showing off their knives via this test.
answered 9 hours ago
cobaltduckcobaltduck
3,4811030
Try to slice a piece of paper. A good sharp knife makes a clean cut. A dull knife makes either a ragged cut, or worse, just pushes the paper to the side. I like this article: https://www.fieldandstream.com/articles/hunting/2014/08/paper-cut-testing-blade-sharpness#page-4 and YouTube is full of videos of people showing off their knives via this test.
answered 9 hours ago
cobaltduckcobaltduck
3,4811030
answered 9 hours ago
cobaltduckcobaltduck
3,4811030
answered 9 hours ago
cobaltduckcobaltduck
3,4811030
answered 9 hours ago
cobaltduckcobaltduck
3,4811030
3,4811030
2
Generally speaking though paper dulls knives very quickly and should not be done often unless you like to sharpen often.
– Nate W
1 hour ago
add a comment |
2
Generally speaking though paper dulls knives very quickly and should not be done often unless you like to sharpen often.
– Nate W
1 hour ago
2
2
Generally speaking though paper dulls knives very quickly and should not be done often unless you like to sharpen often.
– Nate W
1 hour ago
Generally speaking though paper dulls knives very quickly and should not be done often unless you like to sharpen often.
– Nate W
1 hour ago
add a comment |
The back of a fingernail can be a good rough indicator while you're sharpening - see if it "catches" when you apply very gentle pressure at ~45 degree angle. This can also be a good way to check if the edge still has any dull spots.
answered 7 hours ago
tempest_coltempest_col
4145
add a comment |
The back of a fingernail can be a good rough indicator while you're sharpening - see if it "catches" when you apply very gentle pressure at ~45 degree angle. This can also be a good way to check if the edge still has any dull spots.
answered 7 hours ago
tempest_coltempest_col
4145
add a comment |
The back of a fingernail can be a good rough indicator while you're sharpening - see if it "catches" when you apply very gentle pressure at ~45 degree angle. This can also be a good way to check if the edge still has any dull spots.
answered 7 hours ago
tempest_coltempest_col
4145
The back of a fingernail can be a good rough indicator while you're sharpening - see if it "catches" when you apply very gentle pressure at ~45 degree angle. This can also be a good way to check if the edge still has any dull spots.
answered 7 hours ago
tempest_coltempest_col
4145
answered 7 hours ago
tempest_coltempest_col
4145
answered 7 hours ago
tempest_coltempest_col
4145
answered 7 hours ago
tempest_coltempest_col
4145
4145
add a comment |
add a comment |
Slice a tomato with very little pressure. This is almost always when I notice a knife needs sharpening, and the difference is profound.
answered 1 hour ago
OscarOscar
1211
New contributor
Oscar is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
Slice a tomato with very little pressure. This is almost always when I notice a knife needs sharpening, and the difference is profound.
answered 1 hour ago
OscarOscar
1211
New contributor
Oscar is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
Slice a tomato with very little pressure. This is almost always when I notice a knife needs sharpening, and the difference is profound.
answered 1 hour ago
OscarOscar
1211
New contributor
Oscar is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Slice a tomato with very little pressure. This is almost always when I notice a knife needs sharpening, and the difference is profound.
answered 1 hour ago
OscarOscar
1211
New contributor
Oscar is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 1 hour ago
OscarOscar
1211
New contributor
Oscar is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 1 hour ago
OscarOscar
1211
answered 1 hour ago
OscarOscar
1211
1211
New contributor
Oscar is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Oscar is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Oscar is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
You hold it edge up and then you let a silk scarf slowly float down over it. It should be cut neatly in half.
answered 5 hours ago
Tomas ByTomas By
21313
4
Ah yes, let me just whip out one of my collection of silk scarves that I keep for just this occasion and - what the? Kevin Costner and/or Whitney Houston!? What are you doing here?
– MikeTheLiar
3 hours ago
2
@MikeTheLiar if you're not traveling with your juggling kit, you're not prepared for the outdoors.
– Sdarb
3 hours ago
2
Juggling scarves is for amateurs. I juggle the knives. I know they're sharp when I wake up in the hospital.
– Oscar
1 hour ago
add a comment |
You hold it edge up and then you let a silk scarf slowly float down over it. It should be cut neatly in half.
answered 5 hours ago
Tomas ByTomas By
21313
4
Ah yes, let me just whip out one of my collection of silk scarves that I keep for just this occasion and - what the? Kevin Costner and/or Whitney Houston!? What are you doing here?
– MikeTheLiar
3 hours ago
2
@MikeTheLiar if you're not traveling with your juggling kit, you're not prepared for the outdoors.
– Sdarb
3 hours ago
2
Juggling scarves is for amateurs. I juggle the knives. I know they're sharp when I wake up in the hospital.
– Oscar
1 hour ago
add a comment |
You hold it edge up and then you let a silk scarf slowly float down over it. It should be cut neatly in half.
answered 5 hours ago
Tomas ByTomas By
21313
You hold it edge up and then you let a silk scarf slowly float down over it. It should be cut neatly in half.
answered 5 hours ago
Tomas ByTomas By
21313
answered 5 hours ago
Tomas ByTomas By
21313
answered 5 hours ago
Tomas ByTomas By
21313
answered 5 hours ago
Tomas ByTomas By
21313
21313
4
Ah yes, let me just whip out one of my collection of silk scarves that I keep for just this occasion and - what the? Kevin Costner and/or Whitney Houston!? What are you doing here?
– MikeTheLiar
3 hours ago
2
@MikeTheLiar if you're not traveling with your juggling kit, you're not prepared for the outdoors.
– Sdarb
3 hours ago
2
Juggling scarves is for amateurs. I juggle the knives. I know they're sharp when I wake up in the hospital.
– Oscar
1 hour ago
add a comment |
4
Ah yes, let me just whip out one of my collection of silk scarves that I keep for just this occasion and - what the? Kevin Costner and/or Whitney Houston!? What are you doing here?
– MikeTheLiar
3 hours ago
2
@MikeTheLiar if you're not traveling with your juggling kit, you're not prepared for the outdoors.
– Sdarb
3 hours ago
2
Juggling scarves is for amateurs. I juggle the knives. I know they're sharp when I wake up in the hospital.
– Oscar
1 hour ago
4
4
Ah yes, let me just whip out one of my collection of silk scarves that I keep for just this occasion and - what the? Kevin Costner and/or Whitney Houston!? What are you doing here?
– MikeTheLiar
3 hours ago
Ah yes, let me just whip out one of my collection of silk scarves that I keep for just this occasion and - what the? Kevin Costner and/or Whitney Houston!? What are you doing here?
– MikeTheLiar
3 hours ago
2
2
@MikeTheLiar if you're not traveling with your juggling kit, you're not prepared for the outdoors.
– Sdarb
3 hours ago
@MikeTheLiar if you're not traveling with your juggling kit, you're not prepared for the outdoors.
– Sdarb
3 hours ago
2
2
Juggling scarves is for amateurs. I juggle the knives. I know they're sharp when I wake up in the hospital.
– Oscar
1 hour ago
Juggling scarves is for amateurs. I juggle the knives. I know they're sharp when I wake up in the hospital.
– Oscar
1 hour ago
add a comment |
The best method in my opinion is one that must be learned, and involves moving your thumb across the blade, perpendicular to the blade not down it! It's very difficult to describe the feeling but if you do it on enough dull blades and sharp blades you will begin to be able to tell the difference.
One other thing I will do if im sharpening a knife for a friend or coworker to display how sharp it is is shave a couple hairs off the back of my hand. Lick your thumb, moisten the patch on the back of your hand and shave as you would with a straight razor. (You may want to wipe the knife clean after this.) Sounds weird but i do it because your average joe will know its extrememly sharp if you can shave with it and be careful with it.
One other test could be to attempt to very thinly slice a tomato, with and exceptionally sharp knife you should be able to get nearly paper thin slices with a light sawing motion.
answered 1 hour ago
Nate WNate W
1,499617
add a comment |
The best method in my opinion is one that must be learned, and involves moving your thumb across the blade, perpendicular to the blade not down it! It's very difficult to describe the feeling but if you do it on enough dull blades and sharp blades you will begin to be able to tell the difference.
One other thing I will do if im sharpening a knife for a friend or coworker to display how sharp it is is shave a couple hairs off the back of my hand. Lick your thumb, moisten the patch on the back of your hand and shave as you would with a straight razor. (You may want to wipe the knife clean after this.) Sounds weird but i do it because your average joe will know its extrememly sharp if you can shave with it and be careful with it.
One other test could be to attempt to very thinly slice a tomato, with and exceptionally sharp knife you should be able to get nearly paper thin slices with a light sawing motion.
answered 1 hour ago
Nate WNate W
1,499617
add a comment |
The best method in my opinion is one that must be learned, and involves moving your thumb across the blade, perpendicular to the blade not down it! It's very difficult to describe the feeling but if you do it on enough dull blades and sharp blades you will begin to be able to tell the difference.
One other thing I will do if im sharpening a knife for a friend or coworker to display how sharp it is is shave a couple hairs off the back of my hand. Lick your thumb, moisten the patch on the back of your hand and shave as you would with a straight razor. (You may want to wipe the knife clean after this.) Sounds weird but i do it because your average joe will know its extrememly sharp if you can shave with it and be careful with it.
One other test could be to attempt to very thinly slice a tomato, with and exceptionally sharp knife you should be able to get nearly paper thin slices with a light sawing motion.
answered 1 hour ago
Nate WNate W
1,499617
The best method in my opinion is one that must be learned, and involves moving your thumb across the blade, perpendicular to the blade not down it! It's very difficult to describe the feeling but if you do it on enough dull blades and sharp blades you will begin to be able to tell the difference.
One other thing I will do if im sharpening a knife for a friend or coworker to display how sharp it is is shave a couple hairs off the back of my hand. Lick your thumb, moisten the patch on the back of your hand and shave as you would with a straight razor. (You may want to wipe the knife clean after this.) Sounds weird but i do it because your average joe will know its extrememly sharp if you can shave with it and be careful with it.
One other test could be to attempt to very thinly slice a tomato, with and exceptionally sharp knife you should be able to get nearly paper thin slices with a light sawing motion.
answered 1 hour ago
Nate WNate W
1,499617
answered 1 hour ago
Nate WNate W
1,499617
answered 1 hour ago
Nate WNate W
1,499617
answered 1 hour ago
Nate WNate W
1,499617
1,499617
add a comment |
add a comment |
the best test for if your knife is sharp enough is to place it in a stream with the water flowing over the blade. If your knife is sharp, leaves and fish that flow past it will be cut, but if it's the sharpest, then only leaves will be cut but fish will be okay.
source: https://en.wikipedia.org/wiki/Masamune#Legends_of_Masamune_and_Muramasa
answered 4 hours ago
SdarbSdarb
1333
New contributor
Sdarb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
-1 A legend is no answer.
– Jan Doggen
3 hours ago
1
We're looking for stuff that works in the real world, not stuff that works in legends.
– Mark
2 hours ago
add a comment |
the best test for if your knife is sharp enough is to place it in a stream with the water flowing over the blade. If your knife is sharp, leaves and fish that flow past it will be cut, but if it's the sharpest, then only leaves will be cut but fish will be okay.
source: https://en.wikipedia.org/wiki/Masamune#Legends_of_Masamune_and_Muramasa
answered 4 hours ago
SdarbSdarb
1333
New contributor
Sdarb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
-1 A legend is no answer.
– Jan Doggen
3 hours ago
1
We're looking for stuff that works in the real world, not stuff that works in legends.
– Mark
2 hours ago
add a comment |
the best test for if your knife is sharp enough is to place it in a stream with the water flowing over the blade. If your knife is sharp, leaves and fish that flow past it will be cut, but if it's the sharpest, then only leaves will be cut but fish will be okay.
source: https://en.wikipedia.org/wiki/Masamune#Legends_of_Masamune_and_Muramasa
answered 4 hours ago
SdarbSdarb
1333
New contributor
Sdarb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
the best test for if your knife is sharp enough is to place it in a stream with the water flowing over the blade. If your knife is sharp, leaves and fish that flow past it will be cut, but if it's the sharpest, then only leaves will be cut but fish will be okay.
source: https://en.wikipedia.org/wiki/Masamune#Legends_of_Masamune_and_Muramasa
answered 4 hours ago
SdarbSdarb
1333
New contributor
Sdarb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 4 hours ago
SdarbSdarb
1333
New contributor
Sdarb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 4 hours ago
SdarbSdarb
1333
answered 4 hours ago
SdarbSdarb
1333
1333
New contributor
Sdarb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Sdarb is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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2
-1 A legend is no answer.
– Jan Doggen
3 hours ago
1
We're looking for stuff that works in the real world, not stuff that works in legends.
– Mark
2 hours ago
add a comment |
2
-1 A legend is no answer.
– Jan Doggen
3 hours ago
1
We're looking for stuff that works in the real world, not stuff that works in legends.
– Mark
2 hours ago
2
2
-1 A legend is no answer.
– Jan Doggen
3 hours ago
-1 A legend is no answer.
– Jan Doggen
3 hours ago
1
1
We're looking for stuff that works in the real world, not stuff that works in legends.
– Mark
2 hours ago
We're looking for stuff that works in the real world, not stuff that works in legends.
– Mark
2 hours ago
add a comment |
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Note that after honing and using knives repeatedly in similar situations, you will start to learn when the knife is honed to the finest edge without testing. The way the knife feels against the steel tells you where it is in the honing process, once you've learned how that changes with sharpness. And also you can learn to feel the sharpness with a thumb, but it's hard to describe what it feels like - you just have to feel it and then try using the knife and then remember which feelings match with more sharpness. At home the ultimate test is a ripe tomato (IMHO).
– Todd Wilcox
3 hours ago