Photo Chemical Machining (PCM) is a metalworking process that produces precise parts in thin metal. Using a photographic process the image of the shape is developed on a resist laminated sheet metal. The unprotected surface of the metal is chemically etched away resulting in a close tolerance part.

The types of metals PCM works on:

• Stainless steel
• Copper
• Spring steel
• Bronze
• Electrical steel
• Phosphor bronze
• Beryllium copper
• Nickel
• Copper alloys
• Nickel silver
• Nickel alloys
• Aluminum
• Brass

Low cost tooling: PCM is a very economical option for the R & D or prototype phase of a project, as well as long run productions. Here's how you can save money by using a photo tool in comparison to other processes requiring hard tooling:

• Take the metal specified in your drawing...
• laminate it with a light sensitive resist on both sides...
• place a photo-tool on the coated metal and expose it to ultraviolet light.
• The light hardens the resist and the the unhardened portion is developed away.
• The metal sheet is run through a conveyorized chamber where acid-etching removes the exposed metal...
the remaining resist is stripped and the parts are ready for inspection.