The katana is typically around 60-70 centimeters long, with a curved blade that is sharpened on one side. It is forged using a special technique called differential hardening, which involves heating and cooling the blade to create a hard edge and a softer, more flexible spine. This technique gives the katana its characteristic strength and sharpness. katana sword, katana sword carbon steel, Japanese Katana sword Ningbo Autrends International Trade Company , https://www.longquan-swords.com
The katana is traditionally made from high-quality steel, such as tamahagane, which is a type of steel produced from iron sand. The process of making a katana involves multiple steps, including forging, shaping, and polishing. Skilled craftsmen, known as swordsmiths, spend years honing their skills to create these masterpieces.
In Japanese culture, the katana holds great significance and is considered a symbol of the samurai warrior class. It is associated with honor, loyalty, and martial prowess. The samurai would carry their katana at all times and it was considered a part of their identity.
Overall, the Japanese katana is a unique and iconic weapon that represents the rich history and traditions of Japan. Its craftsmanship, cutting ability, and cultural significance make it a truly remarkable piece of weaponry.
Antibacterial industry enters the standardization era
On December 25, it was reported by the Antibacterial Industry Branch of the National Health Industry Association—known as the "Antimicrobial Association"—that the International Organization for Standardization (ISO) has officially released two key international standards: "ISO 22196:2007 — Evaluation Methods of Surface Antibacterial Properties of Plastic Products" and "ISO 20743:2007 — Determination of Antibacterial Properties of Antimicrobial Finishing Textiles." These two standards mark a major milestone in the global development of antibacterial technology, signifying the completion of the initial framework for an international antibacterial standardization system and ushering the industry into a more structured and regulated era.
In recent years, the antibacterial industry has grown rapidly on a global scale. Over just eight years, China's antibacterial sector has evolved into a significant emerging industry with an annual output value exceeding 60 billion yuan. As the market expands, many countries have started to develop their own antibacterial standards. However, inconsistencies in testing methods and standards across regions have created confusion for manufacturers, hindering the smooth flow of antimicrobial products in international trade.
The newly issued ISO standards are based on Japan’s earlier standards, such as "JIS Z 2801:2000" for antibacterial processed products and "JIS L 1902:1998" for textile antibacterial testing. The development of these two standards took three years and involved extensive collaboration among international experts.
According to the reports, "ISO 22196:2007" is not limited to plastic products but also applies to hard surface materials with antibacterial properties. Meanwhile, "ISO 20743:2007" covers not only textiles but also porous materials that require antimicrobial evaluation. This broader applicability ensures that the standards can be used across a wide range of industries.
China has played an active role in shaping these international standards. Dr. Ji Junhui, a leading expert from the Chinese Antibacterial ISO Working Group, has been involved in the development of these standards since 2004, highlighting China's growing influence in the global antibacterial field. With these new standards in place, the industry is now better equipped to meet global demands and promote safer, more effective antimicrobial solutions worldwide.