Re: Another shapton Q
ThomD
>I agree with Pam, I don't see the 15000 does much, and I can't believe they even offer the 30000. The thing about higher grits is that they take much more time per grit. Harelson was saying the guys who do the comps hone for hours. And relative to our efforts he was really emphasizing spending as much time on the stone as possible. I might normally stay on an 8000 for a few seconds, maybe a minute. He was talking about 2 hours (can you recall Pam?), and I think he was for us polishing all that time, as much as we could anyway, cause some of the planes were more ready than others. I could see if you were willing to spend 8 hours on the 30000 it might get you to the next level, but I already think there is a little too much tool obsession as it is. Another option would be a jig like the LV where you could flat polish at 8000 and go up a titch for each upper grit. That approach really works. But I think the increment would have to be a lot less than 1 deg per stop. The idea one has to work so hard on finer grits might sound a little odd, but it is basically what happens in any smoothing operation from blocking a car to polishing a guitar finish. It's just that for some of these we have tools.
Speaking of which. Hollow grinding works fine. The resultant shape is no problem, except as Pam mentioned, the subsequent hand sharpening happens only on the two points, one of which is very hard and the other is soft. Keep in mind the Japanese do sell round waterstones, they tend to be very large diameter. They also sell fully hardened non lam tools, though not so much. It's like everything else, you want to do it, you can figure out a way around the problems. I don't think I should go into all the pros and cons here it's really another sermon, but it can be done. I have even dry ground some Japanese blades, usually to get a bad nick out. I wouldn't do it on a masterpiece tool, either get it nicked, or dry grind it. I did have a workman take an expensive Ouchii blue steel chisel with ebony handle and use it as a cold chisel to remove an oil furnace... another story.
I have an 8000 King that is a rocking stone. I have a bunch of others, I haven't stepped "up:" to the Shaptons yet, I found them a little hard, and a little anti-waterstone in conception, but they sure do work. There was a guy at the seminar who was a Japanese carpenter, not sure what his role was. He was very snooty about the Shapton stones, and said he wouldn't even try them because they would destroy his tools. There is a school of thought that you need to work your tools with the "right" stuff for years, maybe, and they start to take on characteristics that only come with time. These guys don't seem to like new stones, and don't seem to believe that every trip to the stone is tabula rasa, a whole new thing. I'm not here to say whether that is right or not, no way to know. But I would say that you have to find a balance in your work. There isn't any terribly easy way to just buy your way to sharpening respectability. There seems always to be a higher level. So if you can find a level that suits your work, you may be further ahead. If you buy a 30000 stone there will still be some guy saying it's a hacks tool, and he may well be good enough to call you on it.