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I've seen this a few times on one of my razors I had been honing and always using a coticule. I mostly read of other peoples posts about this phenomenon.
What is this the dreaded white line seen at the apex of some coticule edges? It undoubtedly leads to some uncomfortable shaves.
I've got my theories on what it is but no definitive proof.
Well what do you think?
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Both bevel edges not contacting at the apex of the edge is what the white line is. Normally seen with magnification but if you see it with the naked eye than its really big! Bevel not being completely set is another way to say it.
I think it has something to do with using slurry on coticule. Also if you just use coticule for finishing on that razor then it isn't suppose to be a problem. I think it is either some cotis have weird garnets that can cause this or maybe just some metals don't like slurry from a coticule. I don't know much on subject but that is what I think it.
This is well after bevel set and well into the finishing process.
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But, If bevel is not set you can still see the white line. I seen it many times saying to myself "What the #%^&. I thought I was done".Quote:
Originally Posted by S0LITARYS0LDIER
We are not talking about the same thing. I don't know your background or how long you've been honing. I don't know your experience with coticule stones or how adept your skills are with them. If you've handled 1 or 100 but the bevel is set on a 1k, progressed 4, 6 or 8k and then to coticule and this white line of death appears. It happens on dilucot edges too.Quote:
Originally Posted by Gasman
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It sounds to me like the fin has broken off. I am presuming you are looking straight down on the apex. Looking at the side of the bevel if you see a white line that if parallel to the edge, to me that indicates a fin that is becoming fragile and although the razor may shave like a dream now, it is often an edge that does not have a lot of shaves before it looses it. Maybe try going to the coti after the 4K. Your edge may be getting over cooked.
Yes Shaun. It's a phenomenon usually seen from the side going parallel with the apex. Not visible from the top.
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I odviously missed the part about usi g a Coti. And i dont have squat for experiance in that situation.
Hey no worries man. You'll get experience when you play with your coti a little more. Then you'll want another. :)
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Is there a visual aid for this?
Yes since I've watched every relevant coticule related video on the internet. This dreaded white line was actually coined by Dr. Matt. Best seen and described here
https://youtu.be/AWO2TAfRGQM at 12:48.
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The white line is there because you are not hitting the edge. It becomes easy to see towards the polishing stages of the honing but is there when you are setting the bevel as well.
This is not only coticule specific.
Yea, I get the dreaded white line sometimes too and I only use Naniwa hones. IIRC a few light strokes on a bevel setter put an end to them.Quote:
Originally Posted by mainaman
Bob
Are we thinking slurry convexed the edge ( using whatever system) and rounded it out so much that when we go to polish were only hitting the bevel planes and not the edge of the edge. We are seeing the original 1k scratches on the bevel. That's my theory. I subscribe to that or Rezdog's fin breaking off.
As to if it's there at bevel set. I don't know. I would need to see some proof because this can develop on the most crisp clean flat bevel. After it's been established.
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Being as we are talking about a white line that is parallel to the edge and not along the edge I do not believe we are talking about a poor lay set bevel.
I never get that with mine, but I also only use it as a finisher with at most a very light slurry
Strop it on your hand or do 20 laps on leather is it gone ???
if it goes away with that re-finish and be done
NO ??
Then gently kill the edge and re-finish and be done
If neither of those work then you need to re-evaluate your lower stages
I guess you are seeing a wire edge due to overhoning.
Scroll down this webpage for a picture:
Sharpening Questions with Timmy
To get rid of it some will breadknife the razor on a cork. I usally strop it a few roundtrips with minimal pressure lifting the spine 30 degrees on linen strop or my jeans. After that 15 roundtrips on your finisher and you're home and dry.
Thanks, Dr. Matt is a pleasure to watch, clear informative knowledgable videos, surely worth a watchQuote:
Originally Posted by S0LITARYS0LDIER
I think dr. Matt is just too happy. Jmo.