How Scissors are Manufactured?

The material of our scissors' blade is SUS 420J2 stainless steel, purchased from one of the world's leading producers of integrated steel - Japan JFE steel company(JFEスチール). After careful comparisons of varied brands of stainless steel in the market, we decide that the products of Japan JFE possess the steadiest quality, and are therefore the most reliable. Since we set “Providing The Best Quality” as our main goal, the stainless steel of the company becomes our choice for customers.

Stainless steel grade 420J2 is highly corrosion resistant. It has good corrosion resistance in mild atmosphere as well as domestic and industrial environments. It is also resistant to dilute nitric acid, carbonic acid, ammonia, crude oil, detergent solutions, vinegar, food acids, diverse petroleum products, and steam.
Stainless steel grade 420J2 is known for possessing good strength and reasonable impact resistance in hardened and tempered conditions when compared with 440 grades.

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A high-hardness martensitic stainless steel with improved corrosion and wear resistance (edge toughness) compared to 420J2.

It is usually used for hygienic applications and food processing which make it a superb material for kitchen scissors. But the material cost is also much higher than 420J2.

Since we set "Providing The Best Quality" as our main goal, we need to give our customer a strong handle that can support their work. We only use first time raw material to make the handle, the recycled-material do not meet our standard. We choose DSM Novamid(former Mitsubishi's Novamid ), Radipol and TEKNOR APEX(former DSM)as our nylon and TPV supplier. Our handle main material is the compound of PA66 and PA6, it has the strength of PA66 and the surface quality of PA6.

Place flat sheet metal in either blank or coil form into a stamping press machine where die blank the metal into the form of a scissors’ blade.
By using fineblanking (Advance blanking method), the blades’ edges will be smoother than traditional blanking, but the cost is also higher.

Heat treatment is a metalworking processes used to alter the physical properties of the steel.
The hardening process makes the steel harder so it can resist cutting abrasion.
Tempering is performed after hardening, which is used to increase the toughness.
Cooling the hardened steel slowly will produce a steel hard but less brittle.

These process are done by using grinding wheel and sand belt, these steps are all about removing of the metal.
Grinding process remove the metal part in big quantity(0.1~0.15mm) ,which sand belt polishes remove metal just a little bit(around 0.01mm). Grinding can remove metals dents where polishing makes the blades surface bright,shiny and harder to get rusty .

The sharpening process produces the cutting angle/edge, different angle/edge are for different cutting applications.
Serrating creates many small teeth on the edge of the blade, the serration will bite the work piece to prevent work piece slipping.

The Notches on the blade are used to hold the work piece inside and also reduce the opening angle of scissors. According to the lever principle, placing the work piece closer to scissors’ axis allows you to use less force to cut the hard wide cables , that’s why the notch is always close to the axis.