- Joined
- Nov 30, 2001
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- 13,564
Before etching metal, it really really has to be absolutely clean, no "I scrubbed it real good" A laser etch has micro channels that hold onto oils of any kind and dont like to let go of them. Oil is incredibly resistant to etch solutions, I found this back in the 80's with circuit boards. You cant get those things clean enough and you have to go to great lengths to get the oil off.
An etching solution can sit on metal for weeks and nothing will happen if there is an oil barrier.
An etching solution can sit on metal for weeks and nothing will happen if there is an oil barrier.