Saltwater Etching Metal with L-CheapoAug 26, 2020
We have for you today another submission from Bruce Bradley, the gentleman responsible for the six-year L-Cheapo, demonstrating saltwater etching with his laser.
Saltwater etching of conductive metals is a relatively simple electrochemical process. A good Instructable explains the details of the process. The purpose of the laser in etching is to cut the mask material or paint, instead of using a scalpel as in the above demonstration. This allows for complex shapes to be very precisely cut, and with the right mask material, a clean edge mated to the metal. It is recommended that a mask that bonds to the metal such as a thick paint be used, because the burnt edges of tape or polymer mask will fail to adhere to the metal, creating a “lip”.
Any of our L-Cheapo lasers can be used to remove paint or anodizing, and mark metal this way. Check out our products page and order yours! Already got one? Head to the L-Cheapo Facebook Group and share your work. It’s a very friendly place.