I have finished the two fullered blades that I intended to mirror-polish for research purposes. It went reasonably well, I must say. The new jig helped a lot to smooth out and polish the fullers and although I had to resort on occasion to my old method of wrapping the abrasive around a bottle cork or popsicle stick, my fingers were spared or the worst of the worst. They are not perfect, but they are good enough for it to take some time to spot the irregularities and imperfections.
I think that next time I will do even a bit better because I did not have the jigs from the start for these, I have developed and tinkered with them during this project. One such tinkering that I forgot to mention in my previous post was to coat the idler wheels on my belt grinder with PVC flooring offcuts. That has reduced the chatter when grinding and polishing the fullers on the belt grinder, so I could actually use the belt grinder for polishing, and the handmade jig was subsequently only used to remove the perpendicular scratches and replace them with longitudinal ones. And because next time I will have all this equipment and the knowledge already, the results should, at least in theory, be better and with less work.
So here are some pictures containing the main things that I am writing about – blades, flowers, and insects.
The pumpkins are flowering nicely and there seem to be enough solitary bees around to pollinate them.
The blade on the left is the one that I have almost tossed. The fullers align well near the hand, but they diverge towards the tip quite noticeably, at least a few mm. Both fullers on both blades are a bit irregular.
I have a love-hate relationship with mirror-polished blades. They are very difficult to make, it is a lot of hard manual work that busts fingers and back so I hate doing it because I am tired and I do not recover as well as I should from physical exertion. But I also like doing it because it is very rewarding and satisfying to see the gradual change with each step as one progresses from 40 to 7000 grit and then to the buffing compound.
But they are never truly finished because the mirror polish exacerbates every minute irregularity to an absurdly high degree. A few microns deep divot will be seen at a certain angle. Also one thinks all scratches are removed and then, a few days later, you look at it at a very specific angle in a very specific light and suddenly you see that some gossamer-thin scratches are still there.
Then there is the practical side of course – although the steel is hardened, at mirror polish you can literally scratch it if you cut cardboard or office paper with it. They are very precious flowers indeed – basically, the wind blows a speck of dirt on the blade, you wipe it off and it leaves behind a scratch that will be visible in some light. That was one of the main reasons why I have decided to make a tumbled finish for my friends’ knife and why I am going to use it for most of my knives because that hides all but the most egregious scratches.
All in all, although these two blades are not perfect to a degree that I would be perfectly content with them, they are good enough that I shall go on and finish them with high-end fittings.