Intro: Etching a Circuit With Toilet Bowl Cleaner
I needed something cheap and easy to etch my circuit-boards with. After some experimentation, I came up with a simple method to etch PCBs using "The Works" toilet cleaner. Before we start though, let me state that this is my first instructable, and I would like any advice you have. I am not responsible for any damage or injury you cause. This acid takes longer to work than most others, but it is less corrosive too. It took almost one hour to etch our sample piece. We are not going to etch an actual circuit, but test a sample. This can be used on any copper clad circuit board you want to etch.
Step 1: Getting Ready
What you will need:
1.The Works or any toilet bowl cleaner that has a
hydrogen chloride concentration of 20% or more.
2. Hydrogen peroxide.
4. A plastic or glass container( NO METAL!)
6. Safety glasses
7. Something under you're work-space
8. A clean work-space
Step 2: Igor, Hand Me the Works!
I've found that "The Works" works best(no pun intended). Now, I'm no chemist, but I believe it's because The Works uses hydrochloric acid. You can buy it at almost any grocery store. We are also going to need some hydrogen peroxide, you can buy this at most drug stores. Now pour the same measure of peroxide and The Works into you're container (the peroxide first).
Step 3: Now, Lets Etch!
Okay, now put you're board copper-side-up in the solution, and wait...
Step 4: Working, Working...
After about a half hour, your concoction should be a green/blue tint. This is good, this means the copper is eroding, also bubbles should be forming above the board.
Step 5: ... Done!
After an hour the copper you didn't want should be gone, if not, wait fifteen minuets or so. Otherwise, take your pliers, and pull out you're etched PCB! Put it and your pliers under running water quickly, unless you don't like ordinary pliers.
Step 6: Thanks!
I would appreciate any comments, questions, or ideas on this. I hope this instructable helped you.