checking for a burr
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Michi
I dislike attempts to rewrite history
Drag a piece of tissue paper down along the side of the blade towards the edge. If it catches, there is a burr.
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In addition only: the side that feels buttery on the stone is where there still is a burr.
Kawa
Senior Member
Use a flashlight.
Lay it flat on the side of the knife, so that the burr acts like a wall you shine towards.
You can see any burr easily this way. Especially at higher gritts, where feeling burr gets harder, the flashlight trick is the best method for me.
You will always spot burr remnants very easily. It comes in handy to check for those little centimeters per side u missed while deburring
Lay it flat on the side of the knife, so that the burr acts like a wall you shine towards.
You can see any burr easily this way. Especially at higher gritts, where feeling burr gets harder, the flashlight trick is the best method for me.
You will always spot burr remnants very easily. It comes in handy to check for those little centimeters per side u missed while deburring
sounds interesting do yo have a picture of that ? best regards
Kawa
Senior Member
Although this isn't actual burr, more likely a damaged edge due to friction, burr does light up the same way.
As you see, you don't need a very bright light, neither do you need to check in a very dark room.
Kawa
Senior Member
Better example. This is actual burr. It's the same knife, left side versus right side. Without a camera in one hand its easy to walk the knife from heel to tip to spot exactly where the edge isnt clean.
Make sure you clean the knife before checking (running water) and dont cut paper with it first. The fibers attached to the knife will also light up.
Left picture: no burr
Right picture: burr along the way.
Make sure you clean the knife before checking (running water) and dont cut paper with it first. The fibers attached to the knife will also light up.
Left picture: no burr
Right picture: burr along the way.
rob
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Thanks for this, very well explained and easy to see.
I'd make this primary on the deburring headboard. But until you said it... I wouldn't have been able to so rightly point out what I often feel on the last stone as I strop one and the other side. I'll have this burning at the back of my head next time I do a more reluctant steel.
I'll agree with both the tissue and flashlight methods. Pretty solid.
Tissue can't lie but "cumbersome". I like direct light. But in doubt, tissue won't lie.
I hated using a loupe so I got one of these. Very handy and frees up a hand if you need to hold a flashlight. Also super useful for helping to find and pull splinters.
https://www.amazon.com/gp/product/B08HMY6BL7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B08HMY6BL7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
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By the way: if a knife you know well has started to steer after a sharpening: for sure there's a remaining burr causing it.
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Microfiber towel also grabs a burr pretty hard. Easy tell there.
If you draw the burr edge trailing across a tissue or paper towel, the fibers will snag even small burrs. I still do this after many years if I’m unsure
yes i used a ear cotton swab thing and i can feel the small burr with it and see it when shining a flashlight but my fingertips cant feel it
As long as you have some kind of alternative way to check, you'll be fine. I myself have some nerve damage in my fingertips. So for me, I always check a second way for a burr to confirm.yes i used a ear cotton swab thing and i can feel the small burr with it and see it when shining a flashlight but my fingertips cant feel it
how did you get nerve damage in there ??
i find is so annoying that using a an ear cotton swab i can feel the burr also when shining the light but with the fingertips i cant feel
Occupational hazard. Young, dumb and working hard instead of smarter. Lots of grill and sauté station.how did you get nerve damage in there ??
i find is so annoying that using a an ear cotton swab i can feel the burr also when shining the light but with the fingertips i cant feel
big D
Well-Known Member
Try using your finger nail.
For flesh, try this. Compare the known edges of two knives. One with, and one without a burr. See if you can then detect the difference. Think in very subtle terms/feeling.
For flesh, try this. Compare the known edges of two knives. One with, and one without a burr. See if you can then detect the difference. Think in very subtle terms/feeling.
with the nail i can feel it catching the problem is with the flesh
If you can't feel it with your flesh, stop trying and use other methods.
i cant feel but only if its from a coarse stone
You'll develop better feel as you become more proficient.
When I started I could only feel a burr if it was shelf sized. A little better now. When it doubt, grab a cotton ball.
When I started I could only feel a burr if it was shelf sized. A little better now. When it doubt, grab a cotton ball.
I think you'll live
