Specialized Fiber Coating for Wooden Base Materials For softwood materials like cedar, the pencil hardness under JIS strength tests typically measures below 6B, and even after urethane coating, remains below 4B. However, applying UnderTough transforms the hardness to an impressive 3H. This specialized fiber-layered coating enhances the surface strength of materials like paulownia and balsa wood to match that of hardwoods. In practical applications, diving pencils made from paulownia coated with UnderTough have successfully withstood the stress of reeling in blackfin tuna weighing over 150 kg, with no damage.
Key Advantages ・Significant Reduction in Mid-Coating and Top-Coating Clear Layers: Streamlines the production process. ・High Cost-Performance: A 2 kg set can coat approximately 300 wood plugs (200 mm each),
