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