Not always the case, of course... and even if it were, having that point of reference doesn't help you?It's hard to grok in the the beginning, but the pressure needed is about 1/100 of what you'd use with a knife,
Which is also the case with knives... at least as you move up in refinement.and you have to apply the pressure very evenly over the straight razor's edge, almost none of which are actually straight.
The TPT (and other tests) off a perfectly sharp razor could easily feel dull to someone who is exclusively familiar with 50* knives... right up until he notices that he's bleeding.
Ahh, I've never tried a HHT on any blade over the mid-high twenties.
Oh, I gotcha. HHT is a tricky one for a lot of people until you develop your own particular technique and familiarity around that technique. It's quite notorious for one persons HHT being virtually useless to everyone else. Someone can show me a HHT that they expect to impress the hell out of me and it won't mean much to me and vice versa. So be careful about putting too much stock into it until you've been using it awhile and sort of taught/invented your own particular technique around it. I use it myself (after almost a decade honing razors and using HHT) almost exclusively to check that I'm hitting problem spots when I'm too lazy to put the razor under the scope and using a progression with similar levels of bevel polish between stages (in other words I rarely use it any more). Arm hair test (for me) would serve your purposes better. I like to keep a razor flush on the skin, and very... let's say "casually" swipe it down. If it shaves a clean swipe of hair completely smooth without feeling like it's doing anything at all... that's a good razor. If it feels like it's shaving... it's not there yet. I want a sensation that makes me surprised when I look down and see that the hair is gone.
Here are some things I learned over time that will help new razor honers. Your goal is to perfectly set the bevel then uniformly develop every millimeter of the edge as you go up the grit scale.
Get magnification. 5-10x is good.
Get a Sharpie and ink both the bevel and spinewear on every new or new to you razor, then make 1-2 very light passes across the hone. This will reveal a lot of things, like if the razor has been previously honed with tape. Or has a frown, warp, bevels rounded from pasted strops (common on European acquistions).
Learn a bevel set test and practice enough to know how to use it. my first bevel set test is visual inspection under a bare bulb. You should not be able to see the apex of the edge, and you can also see if the hone scratches go all the way to the apex of the bevels. Play around with the angles to see how best to get the light to bounce off the apex. I use the cherry tomato test as a second test, the edge should slice into the skin of the tomato effortlessly. If it requires any effort at all, the bevel is probably not set. You might see some 'sparkle' on the apex that may be pieces of false edge, you'll learn over time to distinguish between these sparklies and the appearance of the bevels not meeting. Sparklies/false edges can be honed off or greatly reduced by very light back and forth x-strokes which won't do much for an unset bevel. Also a tissue paper or a Q-tip will usually catch on a false/wire edge but not an unset bevel. However, bevel set tests don't work well if the edge was previously honed with tape and you don't know it because you didn't ink the edge. The bevel will test as set, but unfortunately it isn't the bevel you're honing on without tape.
Once your apex of the bevels cannot be seen under a bare bulb anywhere along the edge with 5x magnification and the edge passes your secondary test, go to the next grit up (for me this is usually a 5k synth) and give it 40 strokes or so. It's OK to count, you're trying to learn how much time it takes to remove scratches from the previous hone. Now look at the bevels under 5x magnification, especially the toe and heel areas. The scratch pattern should be the same all along the bevels. It probably won't be, you'll most likely see coarser scratches from the previous hone at the toe and heel because 1) the razor smiles a little, and/or 2) your stroke is not even though you think it is. There's no point in going further until the scratch pattern is uniform everywhere. On most razors you will have to learn to bias the pressure from toe to heel as you make your stroke, as in a rolling x-stroke, but you can certainly give the toe and heel a little extra by themselves with circles/ellipses or a finger applying a little pressure on the side of the blade above the offending area. At about 1/100 light knife pressure. If the scratch pattern is not uniform, more pressure won't help, you need better pressure!
Sometimes at the midgrit/5k level you will reveal or observe under magnification a tiny bit of unset bevel or other issue. It's OK to go back to a coarser stone, and you should. If you're whipping a Gold Dollar into shape the first time, you'll probably do the back and forth a few times.
At the 5k stage, I do a hanging hair test after a 'half strop', 10 linen, 20 leather. The reason is unlike a cherry tomato, a hair is very small and I can effectively test the last millimeter of the edge at the toe and heel. A 5k synth will do a great HHT. If that last millimeter isn't as good as the center, I'm not hitting the apex the way I should at the toe and/or heel. If the HHT is worse in the middle, there's likely a little frown that hasn't been removed. Note that I'm not using the HHT to test shave worthiness at this stage, but to test uniformity of the bevel and consequently, the uniformity of my honing pressure.
Repeat the above steps through every grit to finish, testing the last mm of the toe and heel with HHT to make sure the bevel is progressing uniformly all along the edge through every grit.
Hope this helps you get down the path a little more quickly.
Cheers, Steve
Hey C start up a new thread with your honing regiment so we can comment there, if you haven't already started one that is.
Thanks.
I did: it was called "Driving me Potty" At that time I just had cheap Chinese rubbish stones (a 1k that acts like a 200, a 3k/8k and a 2k/5k) and my Welsh slates. Since then I have bought King 800 and 6000 with a smart holder, an expensive Bester Imanishi 8k and finally a vintage small coticule. The Chinese junk has to be lapped every ten minutes. Bloody useless rubbish, fit only for ballast.
Haven't got anywhere with the coticule despite some kind soul posting up a video which I studied carefully.
I am now only honing with tape; I have damaged a number of spines which is very depressing; how can one possibly set a bevel without trashing the spine? Can't be done - obviously.
I have also bought quite a lot of tomatoes as I have virtually no hair left on my arms - I'll have to start on the legs next...
C.
C.
How long have you been straight shaving for? If not for very long then sometimes technique has a little to do with the face feel of an edge. A steep angle will catch whiskers and pop them, while a flatter angle will tend to catch less and slice through them. Holding the blade at an angle to the direction of the pass will also encourage a slicing vs chopping action. Think sashimi knife vs. bone chopping cleaver. Your edge will also degrade astonishing fast with a steep angle. You sound like a technically savvy guy so I am sure you will have your eureka moment.