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Chemical milling or industrial etching is the subtractive manufacturing process of using baths of temperature-regulated etching chemicals to remove material to create an object with the desired shape. [1] [2] Other names for chemical etching include photo etching, chemical etching, photo chemical etching and photochemical machining. It is ...
An image of a modern pattern welded knife blade, showing the dramatic patterning on the side below, and the layering of the steel in the spine above. Acid etching darkens the 1080 plain carbon steel more than it does the 15N20 low alloy nickel steel, producing alternating bands of light and dark on the surface.
ferric chloride may be used for etching copper or zinc plates, whereas nitric acid may be used for etching zinc or steel plates. Typical solutions are 1 part FeCl 3 to 1 part water and 1 part nitric to 3 parts water. The strength of the acid determines the speed of the etching process. The etching process is known as biting (see also spit ...
Etching is a critically important process module in fabrication, and every wafer undergoes many etching steps before it is complete. For many etch steps, part of the wafer is protected from the etchant by a "masking" material which resists etching. In some cases, the masking material is a photoresist which has been patterned using photolithography.
Some modern reproductions with natural hamons are also subjected to acid etching to enhance their hamons' prominence. A true hamon can be easily discerned by the presence of a nioi, which is a bright speckled line a few millimeters wide, following the length of the hamon.
Nital is a critical plot element in the Japanese manga series Dr. Stone, whose story revolves around the mysterious petrification of all mankind. Initially made from nitric acid that they produce from bat guano found in a cave, they then produce nitric acid by using the Ostwald process (using Platinum as a catalyst and urine as an ingredient) and highly distilled alcohol with a ratio of 3:7.
Acid etching may mean: Glass etching, etching glass; Etching, acid etching of metal surfaces in printing; Printed circuit board § Chemical etching, acid etching in ...
The artist applies a ground that will resist acid. Ground is applied by dissolving powdered resin in spirits, by applying the powder directly to the surface of the plate, or by using a liquid acrylic resist. In all forms of etching the acid resist is commonly referred to as "the ground." An aquatint box is used to apply resin powder.