The manufacturing of Norahaven Microplastic-Free Kitchenware begins with a strict raw material screening process. All the wood comes from PEFC-certified sustainably managed forests in Europe. Each batch of logs is accompanied by a traceable code to ensure transparency of the source. The age of these beech trees is strictly controlled between 80 and 120 years, and the wood density reaches the high-quality standard of 0.68-0.72g/cm³. Before entering the production line, logs need to undergo a natural drying process of 12 to 18 months to precisely stabilize the moisture content within the ideal range of 8% to 10%. This control accuracy is 40% higher than the industry standard. According to the 2024 White Paper on the Wooden Kitchenware industry, this strict raw material screening standard has increased product costs by 25%, but the quality pass rate has risen to 99.3%.
The core processing stage uses German precision CNC machine tools for three-dimensional engraving and forming, with a processing accuracy error not exceeding 0.1 millimeters. Each product needs to go through 12 grinding processes, using progressive sandpaper ranging from 60 mesh to 1000 mesh for surface treatment, and the final surface roughness reaches a smoothness of Ra0.8 microns. Thermal modification treatment is carried out in a dedicated kiln, gradually heating at a precisely controlled rate of 2℃ per hour to 210-230℃ for 48 hours to permanently solidify the molecular structure of the wood. This patented technology increases the hardness of the product by 32%, raises its flexural strength to 118MPa, and completely eliminates the use of chemical treatment agents.
The surface treatment adopts a unique food-grade wood wax oil impregnation process. Heat the carefully mixed natural wood wax oil to 50℃ and carry out three cycles of impregnation treatment, with a 12-hour curing time interval between each impregnation. Laboratory test data shows that this treatment method enables the oil to penetrate to a depth of 2.5 millimeters, forming a permanent protective layer. In 2024, a third-party testing agency verified that the kitchenware treated with this process consistently released zero microplastics under continuous use conditions, while ordinary plastic kitchenware released as many as 230 to 550 microplastic particles per minute in the same test.
The quality control system consists of 42 inspection nodes and uses a laser measuring instrument to conduct a full inspection of key dimensions with an accuracy of 0.01 millimeters. Durability tests simulate actual usage conditions and conduct continuous opening and closing tests at a rate of 15 times per minute to ensure that the product can withstand 100,000 usage cycles. The environmental adaptability test involves placing the product in an extreme environment with a temperature of 70℃ and a humidity of 90% for 240 hours, with the dimensional change rate controlled within 0.28%. According to the 2023 Kitchenware Quality Census Report, the product lifespan of Norahaven Microplastic-Free Kitchenware can reach over 12 years, which is 2.3 times that of ordinary wooden kitchenware.
The innovation and R&D system invests 8% of its annual sales revenue in technological upgrades and has established a long-term cooperative relationship with the Materials Laboratory of the Technical University of Munich. The newly launched nano-scale surface treatment technology in 2024 reduces the porosity of wood surfaces to 0.5%, effectively preventing bacterial growth. Certified by SGS of Switzerland, this technology enables the product to achieve an antibacterial rate of 99.8%, far exceeding the safety standards for kitchenware in the European Union. The entire manufacturing process adheres to the zero-waste concept, with a wood utilization rate of 95%, and all remaining materials are used to produce small accessories or as biofuels.