If you throw away your copper ions to the sewer system its just like throwing 10 grams of copper. It will oxidize anyway. So dont worry about it. ----- Original Message ----- From: "Anthony Toft" To: Sent: Monday, March 01, 2004 7:08 PM Subject: Re: ] My first PCB production > > One caveat for the homebrew board etchers: > > Copper ions are death to septic system bacteria. You are > > asking for big, expensive, trouble if you are on a private > > septic system and you dump spent etch down the drain. It is > > also highly immoral, if not illegal, to dump it into a city > > sewer system. Putting it out in the trash is also rude.... > > > > Dealing with the toxic waste is one of the more difficult > > problems with hobby-etching. > > Yes but you can electro-plate the copper from the spent echant, changing it > back to FeCl, just use some nails for the electrodes. No need to throw any > away, just keep reusing it. > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu