What is the slogan of sharpening scissors?

First, sharpen the scissors. It is quite difficult to sharpen scissors, at least it is more difficult than sharpening a knife. There are two scissors. When grinding, the angle between the cutting edge and the grindstone has a considerable relationship with the tightness of the central shaft of scissors. After the two shears are put together, the knife tips are aligned, with moderate tightness, tight but not astringent, loose but not wide. Test the cutting edge with a rag, and the wrist arm is not irritating. With a little cutting, the rag will break easily and meet the specifications. Most people can sharpen their own kitchen knives, but when sharpening scissors, they need some skills. Although you don't need mechanics or mathematics, the scissors you grind will definitely slip when cutting things. Although the scissors grinded by the pencil sharpener can't reach the magical effect of "nitpicking" written in the novel, you can definitely cut off a small nail as long as you put the blade on the nail and push it gently.

Second, a kitchen knife. The blade of the household kitchen knife becomes dull after being used for a long time and needs to be thinned. In a word, it is sharp, as the saying goes, "fast." The kitchen knife is very particular. First of all, it depends on the blade. Whether the steel is soft or hard, the hard one should be hit with a grinding wheel, and the soft one should be grasped with a knife, and then ground with a grindstone. The tool of the shovel is a long iron bar with horizontal handrails at both ends, and a high-quality steel shovel is embedded in the middle of the iron bar to scrape the two edges of the knife thin and then sharpen it. To put it bluntly, this shovel is an iron plane. Some craftsmen use hand-cranked grinding wheels instead of shovels, which is labor-saving and uniform in thickness, but insiders say that grinding the blade with grinding wheels will weaken the rigidity of the blade at high temperature annealing. After the spatula is finished, it will be ground on a millstone. Pour water on the knife while grinding. The sharpener sharpened the knife for a while, then scraped it gently with his fingers and squinted at the blade. A blunt kitchen knife, in the hand of a sharpener, only needs a cigarette to change his face. He also tightened the loose handle again and cleaned all the rust on the knife. A well-ground knife with a straight blade and a black line on it.