Why is it called sharpening shears and knocking down kitchen knives?

The reason why it is called sharpening scissors and knocking down kitchen knives

1, because the edge of scissors is required to be steep, so it is sharpened. Vegetable knife's edge requirements are thin and smooth (no thick in order to have between), so use the tool to shovel thin, bump here is the meaning of boring shovel, that is, with a special tool (steel similar to the woodworker's pusher) to shovel the surface of the vegetable knife flat.

2, because the previous kitchen knife is handmade, the surface of the pits and puddles, the edge of the bevel is not flat, it is not convenient to use the knife, so it is necessary to shovel flat or polished.

Sharpening Shears: Sharpening scissors is still quite difficult, at least more difficult than sharpening knives. The scissors are two pieces, and when sharpening them the angle of the cutting edge to the whetstone and the tightness of the scissors' center shaft are quite relevant. Shear blade two pieces together, the tip of the blade alignment, the right amount of tightness, tight but not astringent, loose but not open. With a broken cloth test edge, wrist and arm do not call the force, gently cut, the cloth is broken, square with the specifications.

The average person grinding their own kitchen knives, can grind fast, but grinding up scissors, more or less to be a bit of know-how, although it does not use what mechanics, math, you can grind out of the scissors, shear things certainly slippery. Sharpener grinding scissors, although not up to the novel written in the "hair blowing" magical effect, but will be the edge on the nail, just gently push, will be able to cut down a small piece of nail to.

Acid chopper: household chopper for a long time the edge of the blunt, you need to acid thin, say a word called sharp, the proverb is called "fast". Acid knife is very delicate, first look at the mouth of the knife, steel is soft or hard, hard to beat with a grinding wheel, soft to grab the knife to grab, and then finished with a whetstone grinding. Acid knife tool is a foot long iron rod, both ends of the horizontal handrail, the middle of the iron rod set a high-quality steel acid knife, with which the knife's two edges of the thin scrape, and then sharpened.

To put it plainly, this knife, is an iron planer. Some craftsmen also use a hand-cranked grinding wheel instead of the acid knife, labor-saving, thin and thick, but insiders say, with a grinding wheel to grind the knife edge, the knife body heat annealing, will weaken the steel. Knife shovel sharpened, on the whetstone. One side of the grinding side to the knife on the water. Sharpener grinding for a while, with a finger on the blade of the knife gently scraped, and squinting to see the blade. A blunt kitchen knife, in the hands of the knife sharpeners, just a cigarette effort, will change the face.

References

Sharpening scissors and kitchen knives_Baidu Encyclopedia