PVD Cold Rolled Stainless Steel Sheet 304 Thickness 2MM with Brass Colour

      PVD Cold Rolled Stainless Steel Sheet 304 Thickness 2MM with Brass Colour

• PVD is the abbreviation of Physical Vapor Deposition. It’s a process to produce a metal vapor (Titanium, Chromium and Titanium Aluminum) that can be deposited on electrically conductive materials as a thin highly adhered pure metal or alloy coating. It’s a process carried out in a vacuum chamber at vacuum using a cathodic arc source.
  
  The coating compounds are made up of various elements such as carbides, nitrides, borides and silicide. The makeup of the compound varies some depending on what the application necessitates. A wide variety of colors can be achieved by adding other gases during the deposition.

Etching is traditionally the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio (incised) in the metal. In modern manufacturing, other chemicals may be used on other types of material. As a method of printmaking, it is, along with engraving, the most important technique for old master prints, and remains in wide use today. In a number of modern variants such as microfabrication etching and photochemical milling it is a crucial technique in much modern technology, including circuit boards.

In traditional pure etching, a metal (usually copper, zinc or steel) plate is covered with a waxy ground which is resistant to acid. The artist then scratches off the ground with a pointed etching needle where he or she wants a line to appear in the finished piece, so exposing the bare metal. The échoppe, a tool with a slanted oval section, is also used for "swelling" lines. The plate is then dipped in a bath of acid, technically called the mordant (French for "biting") or etchant, or has acid washed over it.The acid "bites" into the metal (it dissolves part of the metal) where it is exposed, leaving behind lines sunk into the plate. The remaining ground is then cleaned off the plate. The plate is inked all over, and then the ink wiped off the surface, leaving only the ink in the etched lines.

The plate is then put through a high-pressure printing press together with a sheet of paper (often moistened to soften it). The paper picks up the ink from the etched lines, making a print. The process can be repeated many times; typically several hundred impressions (copies) could be printed before the plate shows much sign of wear. The work on the plate can also be added to by repeating the whole process; this creates an etching which exists in more than one state.

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