California-based start-up Habitat has developed a Nasa-approved kitchen knife that sharpens itself.
The KNasa knife uses an alloy originally developed by the California Institute of Technology and later tested by engineers at Nasa. The alloy, which coats the knife, contains nano-serration properties, which form microscopic teeth along the length of the blade.
As the knife is used, the micro-serration is worn away, exposing more teeth. This self-sharpening property enables the knife to remain sharp for up to five times longer than is typical after reasonable usage. The knife is also multifunctional and can be used to cut meat and hard-crusted bread, traditionally requiring a classic serrated blade.
The knives are reportedly twice as strong as titanium and score 70 on the Rockwell (HRC) scale, which measures the hardness of a material by the indent made by the Rockwell Hardness Tester. Funded via a Kickstarter campaign, the knife retails at $100.
For more on exceptional gadgets and kitchen tech, see Activating At-Home Foodies, part of our latest Industry Trend, Kitchen of the Future. Meanwhile, Transformational Cooking looks at ergonomic, balanced and fluid design for kitchen utensils and spaces.