What are scissors? Who invented scissors?
Scissors in English, in the earliest records, scissors were invented by Edward, an ancient Egyptian, who cut objects by opening and closing two staggered blades.
What lever are scissors?
Scissors are composed of two levers. The lever principle of scissors depends on the length of power arm and resistance arm, that is, when the cutting edge of scissors is larger than the handle, it is a laborious lever, otherwise it is a labor-saving lever, and when the length is the same, it is an equal arm lever.
What kinds of scissors are classified by material? If scissors are classified according to materials, they can be divided into steel scissors, ordinary iron scissors and stainless steel scissors.
Classification by purpose 1, paper-cut scissors
Paper-cut scissors are commonly used small scissors and cutting knives. The principle of paper-cut scissors is to use lever principle to control the blade of scissors to cut objects by controlling the handle of scissors.
2. Beauty scissors
Hairdressing scissors can also be called hairdressing scissors, so in addition to hairdressing scissors for people, there are also pet beauty scissors, which are specially used to trim the hair of pets to achieve the purpose of beauty. Barber scissors have many specifications and models, which can be simply divided into tooth scissors, sharpening knives, warping knives, seamless scissors and other categories according to the purpose of use. Details >>
3, safety scissors
Safety scissors are designed for children. Children's safety scissors are generally made of pure resin or metal-containing resin, which can not only ensure the safety of children using scissors, but also ensure the sharpness of scissors. Details >>
4, electric scissors
Electric scissors are usually used to prune gardening, so they are also called electric pruning scissors. Electric scissors are generally composed of batteries, blades, cutter heads, telescopic rods and other parts. When in use, the cutter head is driven by electricity to drive the upper cutter head to reciprocate, and the lower cutter head is fixed to complete the trimming work. Details >>
5, cable scissors
Cable scissors are a kind of big scissors, which are mainly used to cut cables. Different cable shears have different cable specifications. For example, J- 13 is used for cutting 150mm? Steel strand, 720mm? Steel core aluminum stranded wire, and J-25 is used to cut 150mm? Steel strand, 800mm? Steel core aluminum stranded wire. Details >>
6, more functional scissors
In addition to the scissors mentioned above, scissors can also be divided into medical scissors, kitchen scissors, hydraulic scissors, garden scissors and other categories according to their uses.
How to use scissors How to tighten scissors Generally speaking, scissors consist of a blade, a handle and a rivet in the middle. The loosening of scissors is mainly due to the loosening of rivet screws connecting two blades, so the key to tighten scissors is to tighten rivets. Generally, scissors rivets have screw holes, which can be tightened with a screwdriver or knocked down slowly with a hammer. Be careful not to screw the scissors too tightly, because too tight scissors are not easy to cut objects.
How to grind scissors? 1. Grind with a millstone.
It is a good choice to sharpen scissors with a grindstone, so the grindstone should be a fine grindstone or a fine oil grindstone. Before grinding scissors, sprinkle some water on the grindstone, then put the scissors obliquely and grind them back and forth horizontally, paying attention to grinding both sides of the scissors blade. Rinse the ground scissors with clean water.
Step 2 grind with a sharpening stick
In addition to grinding with a grindstone, you can also grind scissors with a sharpening stick. Sharpening rods are usually steel rods, so when grinding scissors, you only need to grind them back and forth along the angle of scissors incision. But when sharpening scissors with a sharpening stick, you must pay attention to safety and never cut your hand.
3. Grind scissors with a plate.
Another simple way to sharpen scissors is to use the dishes at home. You can choose some dishes with rough bottom, or grind scissors directly with the bottom of casserole. When grinding scissors with bowls and plates, aim the scissors blade directly at the protruding place at the bottom of the bowl and polish it back and forth. You can add some water to lubricate it properly, but you should also pay attention to grinding both blades. Details >>
How scissors rust 1, tin foil rust removal
Iron scissors are easy to rust after being used for a period of time. You can use tin foil to rust the scissors. First find a piece of tin foil with a moderate size, then put on gloves to protect your hands, and then you can rub the rusty scissors blade back and forth on the tin foil. This method can not only remove rust, but also make scissors sharper.
2, white vinegar rust removal
White vinegar is a common condiment in the kitchen. Because it is weakly alkaline, it can also react with rust to remove rust. If the scissors are rusty, they can be opened with white vinegar and soaked for a period of time to effectively remove the rust.
3, toothpaste rust removal
In addition to white vinegar, we can also use toothpaste to remove rust from scissors in life. Because toothpaste sold in the market basically has a friction agent, which has a good cleaning effect on rust.
How to disinfect scissors? Boiling disinfection household scissors can be cleaned by boiling disinfection. The specific method is to add a proper amount of water to the pot, then add a little salt to the water, put the scissors into the pot to boil after the fire boils, and after boiling for 1-3 minutes, you can clamp the scissors to dry naturally or steam them in a steamer. Boiling disinfection method uses the principle of high temperature disinfection. Generally, scissors at home can be disinfected once a month or two.
In addition to boiling disinfection, medical alcohol can also be used to disinfect scissors. The specific method is to soak the scissors in 75 medical alcohol for about ten minutes, and then dry them with an alcohol cotton pad or a clean paper towel. Because 75 medical alcohol can effectively kill most viruses and bacteria, scissors can also be disinfected with medical alcohol. Scissors disinfected with medical alcohol can be kept clean enough. If they feel dirty afterwards, they can also be wiped with alcohol cotton pads.
What does it mean to have children early with scissors? The folk custom in China is to put a pair of scissors on the wedding bed on the wedding day, and sprinkle longan, red dates and other items, all of which represent the meaning of early birth. Because scissors are also called scissors, folk customs believe that putting a pair of scissors when getting married can bring children to the newlyweds earlier.
Scissors also mean to ward off evil spirits. In ancient times, people would wrap small scissors with red thread and then tie them to children's coats, which means to ward off evil spirits. In ancient times, it was also said that scissors could be put under the pillow to sleep after being frightened, which also had the effect and function of exorcism.
Can scissors take the high-speed train? Travel tools such as trains or high-speed trains need to go through strict security checks, so if the blade length exceeds 5cm, there is no way to take travel tools such as trains or high-speed trains. According to the Catalogue of Prohibited and Restricted Articles in Railway Stations, fruit knives (blades exceeding 5cm), knives and scissors are not allowed to be taken on the train. Therefore, knives with blades longer than 5cm, such as hair clippers, are not allowed to take trains and high-speed trains. If it is taken away, it can be stored in the train station or brought back by relatives and friends.
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