Chef knife

A chef's knife—sometimes called a cook's knife—is a medium-to-large general-purpose kitchen tool used in food preparation. Longer, wider blades tend to be labeled chef's knives, while shorter, narrower ones are more often called cook's knives. Originally made for slicing and disjointing large cuts of beef and mutton, it now serves as the main all-around food preparation knife for most Western cooks. European chef's knives typically have a blade about 20 centimeters (8 inches) long and 4 centimeters (1½ inches) wide, though lengths range from 15 to 36 centimeters (6 to 14 inches) and widths can be as slim as 2 centimeters (¾ inch). The smallest and narrowest versions overlap with general utility knives, lacking a heel and choil, similar to a paring knife. A modern chef's knife is designed to perform adequately across many kitchen tasks—mincing, slicing, chopping vegetables, slicing meat, and disjointing large cuts—rather than excelling at any single one.

**Physical characteristics** Chef's knife blades are either forged or stamped. Forged blades are typically high-quality, made through a multi-step process by skilled manual labor: a steel blank is heated, hammered to shape, hardened, then ground and sharpened. Forged knives are usually full-tang, meaning the metal extends from the tip to the end of the handle. Commercially forged knives are struck with a power hammer to create features like the bolster. Stamped blades are cut directly from cold-rolled steel, then annealed, tempered for toughness, heat-treated for strength, and finally ground, sharpened, and polished. This method is typical of cheaper mass-produced knives, though refined processes now produce high-quality stamped knives as well.

Blade materials include carbon steel, stainless steel, laminated or folded sandwiches of both, or ceramic. Carbon steel is an alloy of iron and about 1% carbon, usually without chromium or vanadium. It sharpens more easily than ordinary stainless steel and holds an edge longer, but rusts and stains easily. Some professional cooks prefer carbon steel for its sharpness; over time it develops a dark patina and can corrode without proper cleaning and oiling. Some chefs rest carbon-steel knives for a day after use to restore the oxidizing patina, which prevents metallic tastes from transferring to food. While popular in Asia and the Middle East, some cooks find carbon steel too maintenance-heavy. Stainless steel is an alloy of iron with about 10–15% chromium, nickel, and/or molybdenum, and less than 1% carbon. Lower grades don't take as sharp an edge as high-carbon steels but resist corrosion and are inexpensive. Adding alloys like manganese, niobium, and vanadium improves hardness and edge retention, substituting for carbon, though this makes the steel harder to work and usually costs more. Higher-grade stainless steels—pioneered in Japan—add cobalt, vanadium, and tungsten (sometimes as carbides), producing a very fine grain structure, as in the VG series (e.g., VG-10 from Takefu Special Steels), resulting in extremely sharp blades with excellent edge retention that can equal or outperform carbon steel. Laminated steel combines steels of different tempers—tough and flexible versus hard but brittle—as in san-mai blades, either folded many times (Damascus steel) or forge-welded, with hard steel for the edge and tough steel for the spine and flats. This sandwich aims to use the best of each material: softer, tough steel for resilience and harder, more brittle steel for the edge. Ceramic blades hold an edge the longest but chip easily and may break if dropped; they require special equipment and expertise to resharpen. Made by sintering zirconium oxide powder, they are chemically non-reactive and won't discolor or alter food taste. Handles are made from wood, steel, or synthetic/composite materials.

**Edge** The edge can be ground in several ways: a double or compound grind (V-shape) with single or double bevel; a convex grind; a hollow grind with a concave edge; or a single grind (chisel edge), which creates a "handed" knife—usually for right-handed cooks—common in Japanese knives (called kataba) but rare in European ones. To enhance the chef's knife's versatility, some users apply differential sharpening along the blade: the fine tip, for precision work like mincing, gets a very sharp, acute bevel; the midsection or belly receives a moderately sharp edge for general cutting, chopping, and slicing; and the heavy heel or back of the cutting edge is given a strong, thick edge for heavy-duty tasks like disjointing beef.