Industrial etching | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-01-23

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Chemical_milling


00:00:47 1 History
00:03:31 2 Applications
00:04:13 3 Process
00:04:31 3.1 Cleaning
00:05:42 3.2 Masking
00:06:31 3.2.1 Maskant types
00:07:32 3.3 Scribing
00:08:11 3.4 Etching
00:09:41 3.5 Demasking
00:10:29 4 Common etchants



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SUMMARY
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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.  It is mostly used on metals, though other materials are increasingly important.  It was developed from armor-decorating and printing etching processes developed during the Renaissance as alternatives to engraving on metal. The process essentially involves bathing the cutting areas in a corrosive chemical known as an etchant, which reacts with the material in the area to be cut and causes the solid material to be dissolved; inert substances known as maskants are used to protect specific areas of the material as resists.