The Science of Sharp Blog

Use a straight. You know it makes sense.
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drmoss_ca
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Re: The Science of Sharp Blog

Post by drmoss_ca » Mon Feb 12, 2018 12:47 pm

The Friodur did very well today. I did not eschew the linen, but did 60 strokes (or 30 passes) on it as per normal, followed by 60/30 on the Red Russian, and then for good measure, another 60/30 on a resurrected Old Dog. I got as good a shave as one can get from a full hollow razor, which means exactly both what it says, and also what it doesn't say. With respect to what it didn't say, I have similarly stropped the living hell out out of my 7/8 quarter hollow usual daily razor and I hope that tomorrow - Tuesday - I shall have some kind of summation of my impressions of this method of honing. I think I can foresee the outcome. Both work. Traditional, edge-first honing, works very well as long as you know the steel, your hones and the regime needed for a particular razor. The edge-trailing approach wherein you make a wire edge and break it off allows for ANY razor to get to shaving sharp, even if we don't yet know if it can be as exquisitely sharp as in the prior method when all the variables I listed are known. I repeat, we don't yet know, assuming a theoretical razor and hones, all variables known, which approach would win. My guess is that it might still depend on the "unknown unknowns" (whoever would have thought that Donald Rumsfeld would have left a useful legacy?) of the black arts of metallurgy and forging, wherein one system might work for one blade, and the other approach work better for another.

I give full marks to Todd for approaching this as a scientist ought, and would ask that any further research take up at these points:
1. The same razors Todd used are honed edge-first in traditional progressions across ever-finer hones so that there might be a valid comparison.
2. Other users have their efforts recorded on SEM to be able to compare results.

To be pragmatic (what the kids describe as tl;dr), my favourite and most used razors can be honed by me in traditional ways that make me happy. I know the hones, the razors and their steels, and what works for those particular examples. But there are razors that have not responded to those traditional regimes or many variants of them, yet those same razors have become sharp by Todd's method. That might mean he is onto some magically correct approach, or it might just mean I never did quite discover the variation of the traditional approach that is best for them. BOTH ANSWERS ARE LIKELY TO BE TRUE! We are all happy to agree that certain razors prefer some variation of the usual edge-first honing to really show how sharp they can get. Why would it not be equably reasonable to assume there might be just as much variation amongst razors subjected to the edge-trailing method? It is evidently as open to as much variation, experimentation and discovery as the standard method of honing, and it may well be that each method can get equally close to the theoretically perfect edge. No doubt a razor can be honed either way into a state where it will shave, but is one way just a little better? For that razor or perhaps for all razors? For all hones or just those particular ones? More reliable and achievable for the beginner or also true for the experienced honer? Now aren't those questions that should excite any open-minded honer? Let the games begin and let us hope that well-equipped honers with scanning electron microscopes can keep us from error!
"Je n'ai pas besoin de cette hypothèse."
Pierre-Simon de Laplace

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drmoss_ca
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Re: The Science of Sharp Blog

Post by drmoss_ca » Mon Feb 12, 2018 1:23 pm

brothers wrote:
Mon Feb 12, 2018 11:34 am
Still having fun? Sort of, I suppose, in a technical kind of way. Certainly not in the quality of the shave.

After reading carefully several times and making notes, here's what I did this time:
1000 grit stone (Norton) 20 edge trailing laps;
4000 grit stone (Norton) 20 edge trailing laps;
Denim strip soaked with polish 30 laps;
Diamond spray .25 on leather 30 laps;
Clean denim strip 50 laps;
Clean leather 50 laps;
[Note: I improvised the following additional steps --- 50 laps on linen strop followed by 50 laps on the Jemico Red Russian hanging strop]

Notwithstanding yesterday's cutting of arm hair, the objective is to cut facial hair. Following all of the above, the blade looks good under magnification, and on the face it feels smoother than all of the grabbing I felt yesterday. Did the razor remove my whiskers, you ask? Little or none! I am not happy! After the shave I took the razor back to the Jemico hanging linen and leather strop for another 50 laps on each. The razor does indeed cut standing hair at about a half inch above the skin, and I can hear it pop. I think this is what they call "tree top" cutting.

Whether or not this razor is going to smoothly remove any whiskers the next time I shave with it remains a mystery. I may decide to change a couple of things before the next shave, and that would be to add some edge leading laps to the preliminaries and to substitute my 12K Naniwa Super Stone or the Norton 8000 for the Norton 4000. I am leaning toward the Naniwa.
Gary,
The information in that blog is not clearly presented, and I appreciate your difficulty. The 1k stone, if needed is for bevel-cutting, and ought to use back and forth strokes. The medium grit hone is to be used edge-trailing - I agree. Metal polish on a denim strop, then diamond on leather, agreed (I used CrO2, but I have come to prefer it over many years). But when you go on to clean denim, clean leather, then linen and then Red Russian leather you are going out on your own. Possibly in the right direction - I find the direction to avoid linen perverse, but I have heard so many times over the years. I feel sure that honing, by traditional or by alternative methods, ought to create a basic decent shaving edge, and that stropping ought to complete and refine the process.
I'll add these comments:
1. The need to strop excessively means there was something wrong with the honing. Stropping is way more important than most realise, but if you get the edge right off the last hone or pasted strop, you don't need to go to town. Stropping comes into its own when preserving an edge, not adding something to one that has been freshly honed.
2. The need to avoid stropping means you are hung up on the pseudo-sharpness of an irregular edge - maybe a wire edge, or maybe just serrated more than necessary from avoiding a decent finishing hone. I have written some years ago on the attractions of a coarsely-honed edge just being used WTG, and it's easy and reliable, and maybe it is what our grandfathers relied upon, but it won't go ATG.

I think we both want a straight razor edge that shaves well WTG, and improves that several-fold in the next ATG pass. In that sense I don't care whether the blade was honed edge-first or edge-trailing - I just need it to do the job comfortably and efficiently. I'm pretty sure there is no universal answer about which of those is better. For each blade, its owner, his skills and the hones he possesses, there is likely to be a best solution. Our job is to find that solution for the razors we use. I doubt there is a one=size-fits-all answer for all razors, all honers, and all hones. At the end of the day, getting a shave that pleases is the only criterion that counts. So as long as you are happy, splendid! The remaining problem is the ongoing suspicion that somebody, somewhere, is getting a shave that is closer, easier, and more comfortable than yours. Eventually I shall learn that the right question to ask first is 'Really? Are you sure? Mine is pretty damn good after decades of learning!' and not 'What razor? What hone? What soap? I hate you!'
I don't begin to believe the things I read on the internet about conspiracy theories, UFOs, Bigfoot, crystal healing, homeopathy or how to burn fat. Probably I ought to add closer shaves and easier honing methods to that list! :wink:

Chris
PS: maybe all we are getting from that method is that almost anything works if you bother to cut a decent new bevel first....
I happen to think there is more to it than that, but all the same, there are no panaceas unless you work for Merck, Sharp and Dohme or their ilk.
"Je n'ai pas besoin de cette hypothèse."
Pierre-Simon de Laplace

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Re: The Science of Sharp Blog

Post by brothers » Tue Feb 13, 2018 6:11 pm

. . . . pretty damn good after decades of learning!
So true! There's more than science --- the art, talent, and intuitive qualities of the process.
Gary

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Re: The Science of Sharp Blog

Post by brothers » Wed Feb 14, 2018 3:49 pm

Over the course of these past two days I've experienced shaving joy. The straight razor is still in the box. The stones and strops are undisturbed. The General razor / Kai blades are ZeroZipNada effort to use. I'm smiling ear to ear. I'm not trapped by frustration with the Quest for Shaving Perfection, tied to a dependency on a straight razor. The straights are a wonderful pastime and diversion when I want to emulate my grandfather out on the farm with an old dull straight razor when he would shave on Sunday morning before loading up the family and heading to town for church. Exactly what Doc Chris is talking about when he says "pretty damn good after decades of learning." I'm so happy to know I have experienced the straight razor alternate universe, and even happier knowing I never gave up on finding the finest (safety) razor and blades available to satisfy all of my perceptions and expectations in the successful achievement in the Quest for Shaving Perfection. I have come to realize that I would have never understood just how good a shave experience can be without having to go first through shaving h*** in order to reach my destination. I've never given up on the ultra expensive straight razor world of my forebears, but I'll never prefer them over the cheapest and best currently available.
Gary

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Re: The Science of Sharp Blog

Post by drmoss_ca » Wed Feb 14, 2018 5:10 pm

Sounds to me as if you should be ceremonially stripped of all your straight razors and banned from posting in straight razor forums!
I have a General too. I agree it is a lovely safety razor. I still feel there is some point - some satisfaction - in trying to attain perfection by my own hand. If you have given up on that and feel content with your choice I'm pleased for you. I still think there is an equal or better edge that I might make for myself somewhere out there. Fortunately there is room for all of us, both in this forum and in the world at large.

C.
"Je n'ai pas besoin de cette hypothèse."
Pierre-Simon de Laplace

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Re: The Science of Sharp Blog

Post by EL Alamein » Tue Feb 20, 2018 6:54 pm

Dr. Moss and Gary,

Thanks so much for embarking on this with me. Your observations were more or less in line with my own on this and it's nice to see some of the learned hands come up with what you've come up with.

I will say I do agree that this can be a method to use on a recalcitrant razor. It seems to coax an edge where more traditional methods do not. I wonder if it speaks more to the quality of steel of such a blade more than anything.

Dr. Moss I know you mentioned the 1K stone being more for bevel setting but the observation by Todd that all edges, commercial as well as traditionally honed, wind up as double-beveled got me thinking. Maybe the 1K drops the bevel down to a single bevel for re-honing quicker if not too many strokes are employed. I'd say around ten round trips on a normal razor. I know that's all it takes for my TI's. If It may also depend on the stones employed. Were I to use my Shapton 4k to touch up a razor it seems to take forever to get it to level that bevel. If I recall, my Norton 4k did it quite quick. Anyway I kind of like my Shapton 1K for that purpose. Doesn't seem to remove too much steel either. Hopefully I'm making sense here.

Indeed this was a great road for me to travel to liven up an old habit I'm glad others may have gotten a thrill out of it as well. I'd love to have Todd review what breadknifing an edge may do to an edge before honing it. I know Maestro Livi employs it and, like Dr. Moss I thought it showboating until I tried it. I may just be imagining it but now I think it actually helps deliver a smoother edge. The jury is still out though.

Gary, I am very happy for you finding a road to Rome that gives you satisfaction. There are many and we should enjoy all that we can. Travel on in good health!

Chris

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Re: The Science of Sharp Blog

Post by brothers » Tue Feb 20, 2018 9:17 pm

Just this afternoon I was thinking that even though the scripted method Todd provided (with much thought and effort, which is deeply appreciated) didn't work for me even though I wanted it to, I should look at a more conventional means of sharpening the Red Imp Wedge. I like that razor and now that I've made a start at putting an edge on it, I want to see if I can make it shave like it's supposed to.
Gary

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