骨董品店で買った錆包丁を18時間手作業で研いだ結果
Video Statistics and Information
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Channel: 圧倒的不審者の極み!
Views: 32,354,994
Rating: 4.7977633 out of 5
Keywords: 包丁, 出刃, 研ぎ方, 錆, さび落とし, 錆落とし, 研ぎ, 手作業, 砥石, 柄の交換, 波紋, 大出刃, 中古, 骨董品, 藤次郎, サビ, rusty, kitchen knife, Japan's, japan, Manually, repair
Id: mUfK3iu7-N4
Channel Id: undefined
Length: 12min 29sec (749 seconds)
Published: Wed Nov 22 2017
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Seeing it in that horrible condition was heartbreaking.
Loved this video, but this is far from perfection. There are still tons of scratches all over the body of the blade, I would have liked to see those sanded out as well. I know that with japanese kitchen knives the intent is to have a more flat/dull/patina'd body and then fading into the edge have a nice mirror shine, but in this case it quite clearly just looks unfinished to me. When he was sanding, he kept just going in the same direction on the knife, which also means the previous sanding is less likely to be buffed out entirely. He was like 90% of the way there, just a shame to see him stop a little bit short on an otherwise solid restore.
Also, seeing him slice through all that stuff at the end, while it does show how much sharper it is than the cheap knife, he is really doing a number on the edge of that blade. I'm sure it's good steel and will hold the edge well, but still, why go through all that trouble just to mess it up?
Since it's not explained in the video, when he is sort of sanding the whetstones, he is making a "slurry", which aids in the cutting process (the removal of steel to sharpen), but also gives it a finer sand point than the noted grit (2000, 4000, 8000, etc), so doing this on a 4000 grit stone might help bridge the gap between a 4000 and 8000 grit stone.
The sound it made when he cut the sponges was not the highlight of my day so far.
This is a really entertaining video as you can see how much damage the knife had originally and how much effort went into fixing it. After watching it though I really wondered if doing all that work was actually all that worth it or how efficient it was. I came to the conclusion that while it looks really cool and the person is using a bunch of japanese wet stones, it's just not efficient and there are better ways to do the same thing but cheaper as well as faster.
This video it takes 18 hours to fix the knife up properly. That is a lot of time on a single knife worth $500. Just going off of minimum wage that's roughly $135. There are also numerous different japanese wet stones used during the process which increases that cost drastically.
During the video these items are used
Sharpening Stone Holder costing $25
Flattening stone costing $32
Buffing compounds costing $20
120 grit waterstone costing $23
220 grit waterstone costing $34
1000 grit waterstone costing $60
2000 grit waterstone costing $40
6000 grit waterstone costing $50
8000 grit waterstone costing $110
for a total of roughly $529
That is a lot of money to sharpen a knife that costs that same amount.
Instead of spending 18 hours on all of that work with very expensive waterstones I suggest instead just going out and getting a belt sander with a 6 inch disk setup on it.
Something like this 4-36 inch belt sander only costing $85
You can get various different grit belts or disks for it all costing roughly the same amount
Here's an assortment of 80, 120, 180, 220, 320, and 400 grit wet or dry sanding belts costing $30
600, 800, 1000 wet or dry sanding belts costing $18
You can get further ultra fine grit sanding belts at roughly that same range of price as well. Doing it this way will save a significant amount of money as well as time while being able to keep the best angles on the blade thanks to the various attachments that come with most belt sanders. Just remember to always end it with a polishing compound to get that perfect mirror finish. You can also split up the grits by using the disk sander for the much higher fine grits. Like the wetstones it's important to keep the knife wet.
Manually repairing* a* very rusty Japanese* $500 kitchen knife
/r/titlegore
Do you have the knife at any sort of angle when you are sharpening the blade?
It's almost as if you are a belt sander salesman. You can get starter stones much cheaper and all you need (for home) are 2 basic grits, not the whole range shown in the video.