Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I finally etched my board. Result was excellent. Pics are posted in the photo section under "Samsung 1665"

This is a relatively complex 2 sided board. As I've mentioned previously, the I used a Samsung 1665 printer on glossy magazine paper. It only took one try to get etchable results. Transfer was done using the lowest cost laminator from Walmart. I ran it through 4 times.

Etching was done using 500ml of cupric chloride which I made by dissolving copper wires in HCL and 33% H202. I have 1.5L but I was curious how much H2O2 is needed to keep the etchant fresh. This board required 25 drops. The solution turns brownish when it is spent. Adding a few drops of h202 changes the color back to emerald green.

Many mentioned having trouble removing the toner after etching. In Canada, there's a paint brush cleaner call "Polyclens". I just paint it on, wait 30 seconds and then wipe off the toner with paper towel.