Ads
related to: where to buy hydrofluoric acid for glass etching cream carded mean
Search results
Results From The WOW.Com Content Network
Hydrofluoric acid [2] is most often used to etch glass in a special marker equipped with a tip formed by a bed with a round footprint that runs down a vertical surface. The flow intensity can be influenced by pressing the marker. After applying the liquid to the glass surface, a permanent impression is formed, which cannot be removed by cleaning.
Leptat glass is a glass that has been etched using a patented acid process. Leptat takes its name from the Czech word meaning "to etch", because the technique was inspired by a Bohemian, Czech Republic (former Czechoslovakian) glass exhibit viewed at a past World's Fair in Osaka, Japan, and patented in the United States by Bernard E. Gruenke ...
Although hydrofluoric acid is regarded as a weak acid, it is very corrosive, even attacking glass when hydrated. [ 20 ] Dilute solutions are weakly acidic with an acid ionization constant K a = 6.6 × 10 −4 (or p K a = 3.18 ), [ 10 ] in contrast to corresponding solutions of the other hydrogen halides, which are strong acids ( p K a < 0 ).
Buffered oxide etch (BOE), also known as buffered HF or BHF, is a wet etchant used in microfabrication. It is a mixture of a buffering agent, such as ammonium fluoride NH 4 F, and hydrofluoric acid (HF). Its primary use is in etching thin films of silicon nitride (Si 3 N 4) or silicon dioxide (SiO 2), by the reaction: SiO 2 + 4HF + 2NH 4 F → ...
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 ...
For fluorine etching, however, as first described in 1912 by Hieronim Wilder, a normal glass plate was coated with colophony (a solid resin obtained from certain types of conifers), followed by the artist etching a design into it, which was then treated with hydrofluoric acid. [2] The glass plate was inked, wiped and printed using a rolling ...
For instance, buffered hydrofluoric acid (BHF) is used commonly to etch silicon dioxide over a silicon substrate. Different specialized etchants can be used to characterize the surface etched. Wet etchants are usually isotropic, which leads to a large bias when etching thick films.
In the modern revival all of the top layer except the areas needed for the design are usually removed by an etching process—the figure areas are covered with a resist layer of wax or some other acid-resistant material such as bituminous paint, and the blank repeatedly dipped in hydrofluoric acid, so that cameo glass is in some sense a sub-set ...