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The Razor Edge Book of Sharpening (1985) [pdf]

sharpeninghandbook.info

11–20 of 54 posts

Re: The Razor Edge Book of Sharpening (1985) [pdf]

#11
The metadata says this was digitized by the Internet Archive in 2016. There is a better scan of a better copy of the book at the Internet Archive's library:

https://archive.org/embed/razoredgebookofs0000jura

I don't know whether the book is still in print, but it's in stock at Amazon:

https://www.amazon.com/Razor-Edge-Book-Sharpening/dp/0966605...

Re: The Razor Edge Book of Sharpening (1985) [pdf]

#12

Earlier quoted context omitted.

Nice. I learned this "at the knee" from my grandfather and father. A few things in no particular order... This skill takes practice, the sharpening systems only help to get the angle consistent; you'll be happier if you learn to do it without one, practice on knives and especially scissors you don't care too much about first, you'll need a few stones and probably end up with several before you find the ones that work…

Or you can buy a jig like Spyderco Sharpmaker and have a razor-sharp edge in 5 minutes.

I find the Sharpmaker great for touching up an edge, but not nearly aggressive enough (without adding an aftermarket set of diamond rods) for repairing or setting a new edge

Re: The Razor Edge Book of Sharpening (1985) [pdf]

#13

Not a bad read. Looks like it's got a lot of technique(s) and basics. Could probably use some updates on materials and tooling for higher end (modern/powder metallurgical) steels. Knowing how to sharpen your tools is something just about everyone should learn. Almost all of us have at least a kitchen knofe that needs attention.

Nice. I learned this "at the knee" from my grandfather and father. A few things in no particular order... This skill takes practice, the sharpening systems only help to get the angle consistent; you'll be happier if you learn to do it without one, practice on knives and especially scissors you don't care too much about first, you'll need a few stones and probably end up with several before you find the ones that work…

Re your last point: There is some well researched material, along with scanning electron microscope images of edges, that says this is incorrect. When sharpening to say “working sharp” you leave a burr on the edge that can quickly be folded over, and reduce longevity of the sharpness of the edge. The most durable edges have been deburred to the true edge apex, and this often will give you an edge that would rate “razor sharp” or ~50 BESS on a sharpness tester. This has been proven out in a real life commercial setting, slaughterhouses. The edges that Dr. Kraichuk sharpened would stay sharp for 7 full carcasses, rather than 4-5 done with previous methods that can leave a burr on the blade.

For more information about this, including the proof with SEM photos and extensive testing via scientific method, check out the work of Dr. Vadim Kraichuk

https://www.amazon.com/Knife-Deburring-Science-behind-lastin...

There is a lot of discussion about this in the Tormek forums, where Dr. Kraichuk was a frequent contributor. I can attest to how well this works, every knife and woodworking tool in my house is hair splitting sharp, and they stay that way with little effort.

Re: The Razor Edge Book of Sharpening (1985) [pdf]

#14
post #9

I happen to own a paper copy of this book, and as usual for sharpening books, they throw in a chapter on axes as an afterthought. Sharpening an ax is different enough from most other sharpening that you should get a specialized text for it. It's not that difficult or terribly specialized, but knife sharpeners always seem to want to apply the ideas of knife sharpening to axes, which isn't quite right all the time. Two…

The Ax Book by Dudley Cook is also in the Internet Archive

https://openlibrary.org/works/OL495023W/The_Ax_Book

So is "One Moving Part" https://openlibrary.org/works/OL36779701W/One_moving_part

Re: The Razor Edge Book of Sharpening (1985) [pdf]

#15
post #9

I happen to own a paper copy of this book, and as usual for sharpening books, they throw in a chapter on axes as an afterthought. Sharpening an ax is different enough from most other sharpening that you should get a specialized text for it. It's not that difficult or terribly specialized, but knife sharpeners always seem to want to apply the ideas of knife sharpening to axes, which isn't quite right all the time. Two…

Thank you for this, I have an el cheapo hatchet that needs attention.

Re: The Razor Edge Book of Sharpening (1985) [pdf]

#16

Years ago, when I lived in Seattle, I remember meeting an old Japanese blacksmith. I found him when I was looking to buy some of the pull-style hand saws, but when I met him to pick up the wares, it turned into a bit of a social call. He must've been around 80 or so, lived by himself in a house that was half home half workshop. Got into talking about saws and chisels and blades and sharpening, complete with a Mr.Miya…

[dead]

Re: The Razor Edge Book of Sharpening (1985) [pdf]

#17
I have been sharpening my own knives and tools for 45 years, and have been doing it in the same way since I was in my teens and my dad and I read some article (in Popular Science, maybe?) which Just Worked. My dad was a bit more patient than I have ever been and his edges always shaved hairs, dry. My edges are still quite good though.

Anyway Ima procrastinating today and saw this HN item and hesitated, oh no, have I been doing something wrong all these years? So in the spirit of never stop learning I bit the bullet and read it.

I didn't have to read far though. First came the don't use oil bit and then next the relief and the burr, and nope! Hooray, whatever we read back in the day was the equivalent of this. Maybe it was the same people, I remember a folksy tone.

The sad thing is in all those years none of the people of my acquaintance, with the exception of my daughter, have ever had any interest in sharpening/maintaining their knives, and if they do anything (most don't), it's an electric sharpener. I've passed through some home kitchen horror shows, and now if I know I'm going to be cooking in somebody else's kitchen, I bring my own knives, even internationally. Mandatory for AirBnBs. I remember reading up on packing a set of knives on a Thalys train and reading some worrying restrictions. But decided, well WTF to chefs do in France? I didn't get hassled, maybe I was lucky.

Anyway, even though I don't think I've ever converted anyone, I always encourage people to learn to sharpen/maintain their knives. I will usually haul a big DMT hone along with me on trips to home kitchens and do a quick repair job on the host's knives. Weirdly, quite a few people are very wary of sharp knives! Dull knives are what terrifies me...

Re: The Razor Edge Book of Sharpening (1985) [pdf]

#18
These are the methods I'm aware of:

-randomly swipe that long skinny thing that's in the knife block along a chef's knife, perhaps aiming for 45 degree angle -as a kid my dad had something I think he called a whet stone. He'd put 3-in-1 oil on it and we'd carefully swipe the blade against the stone.

Either of these right?

Re: The Razor Edge Book of Sharpening (1985) [pdf]

#19
post #18

These are the methods I'm aware of: -randomly swipe that long skinny thing that's in the knife block along a chef's knife, perhaps aiming for 45 degree angle -as a kid my dad had something I think he called a whet stone. He'd put 3-in-1 oil on it and we'd carefully swipe the blade against the stone. Either of these right?

I think the long skinny thing is a hone. You use that after sharpening to hone the edge. But it won't make a dull edge sharp.

The whetstone sounds right. I think there's a lot of technique to how you swipe it, you can't just go in all guns blazing. But I don't know how to do it, so I'm not sure.

Re: The Razor Edge Book of Sharpening (1985) [pdf]

#20

Earlier quoted context omitted.

Nice. I learned this "at the knee" from my grandfather and father. A few things in no particular order... This skill takes practice, the sharpening systems only help to get the angle consistent; you'll be happier if you learn to do it without one, practice on knives and especially scissors you don't care too much about first, you'll need a few stones and probably end up with several before you find the ones that work…

Re your last point: There is some well researched material, along with scanning electron microscope images of edges, that says this is incorrect. When sharpening to say “working sharp” you leave a burr on the edge that can quickly be folded over, and reduce longevity of the sharpness of the edge. The most durable edges have been deburred to the true edge apex, and this often will give you an edge that would rate “raz…

I don't disagree at all but this might be a problem with folk knowledge and terminology. I was taught to remove the burr or wire, you could feel it, and took it off with a steel or ceramic stick. My grandfather was a machinist and woodworker and I doubt he knew what the edge looked like. "razor" meant a pass with very high count fine (3k, 6k+) stones and maybe paste (I have green paste... I think it's Chromium Oxide ~45k) and leather strop. I'll do that for my straight razor, I don't for the kitchen knives.
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