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 (referred to as the "Antimicrobial Association") that the International Organization for Standardization (ISO) has officially released two new 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 standards mark a significant milestone in the development of the global antibacterial industry, completing the initial framework of an international standardization system and ushering in a new era of standardized antibacterial product development.
In recent years, the global antibacterial industry has grown rapidly, evolving into a major sector with increasing demand across various sectors such as healthcare, consumer goods, and textiles. Over just eight years, China's antibacterial industry has matured into a key player, with an annual output exceeding 60 billion yuan. As the industry expands, many countries have started to develop their own antibacterial standards. However, the lack of uniformity in testing methods and standards across regions has created confusion among manufacturers and hindered international trade.
To address these challenges, the newly released ISO standards were developed based on Japan’s JIS Z 2801:2000 and JIS L 1902:1998 standards, after a three-year collaborative effort involving experts from multiple countries. The "ISO 22196:2007" standard is designed not only for plastic antimicrobial products but also for evaluating the antibacterial properties of hard surfaces, including those made from non-plastic materials. Similarly, "ISO 20743:2007" applies to both textiles and porous materials, offering a broader scope for antimicrobial evaluation.
China has played a vital role in shaping these international standards. Dr. Ji Junhui, a member of the Chinese Antibacterial ISO Working Group, has been actively involved in the development of these standards since 2004, contributing valuable insights and expertise to the process. With these new standards in place, the global antibacterial industry is now better equipped to ensure product safety, consistency, and compliance across borders, promoting more efficient and sustainable growth.