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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 ...
the glass plate on a flat surface is always placed with the emulsion side up. [24] Glass plates are never stacked nor have any pressure placed upon them. The sleeve or enclosure is labeled before placing the glass plate inside. [24] Since glass plates are fragile and brittle, duplicates are created if a glass plate is to be used often for ...
Piranha solution, also known as piranha etch, is a mixture of sulfuric acid (H 2 SO 4) and hydrogen peroxide (H 2 O 2). The resulting mixture is used to clean organic residues off substrates , for example silicon wafers . [ 1 ]
Conservation-restoration is the practice of cleaning and discovering the original state of an object, investigating the proper treatments and applying those treatments to restore the object to its original state without permanently altering the object, and then preserving the object to prevent further deterioration for generations to come (Caple, p. 5-6). [1]
Aqua regia is also used in etching and in specific analytic procedures. It is also used in some laboratories to clean glassware of organic compounds and metal particles. This method is preferred among most over the more traditional chromic acid bath for cleaning NMR tubes, because no traces of paramagnetic chromium can remain to spoil spectra. [1]
A print made in 1907 from a photoengraved plate. It reproduces a sketch of Parga's castle made by Ludwig Salvator.. Photoengraving is a process that uses a light-sensitive photoresist applied to the surface to be engraved to create a mask that protects some areas during a subsequent operation which etches, dissolves, or otherwise removes some or all of the material from the unshielded areas of ...
A stop bath, [a] typically a dilute solution of acetic acid or citric acid, halts the action of the developer. A rinse with clean water may be substituted. The fixer makes the image permanent and light-resistant by dissolving remaining silver halide. A common fixer is hypo, specifically ammonium thiosulfate. [4]