> > An estimated 0.34 billion metric tons of copper currently exists in the oceanâs waters based on a concentration of 0.25 ug/L and a volume of 1.338 x 109 km3 > Hmmmm, a 1/3 billion metric tons of copper is in the oceans? Does that take into account the 3 oz of etching solution I dumped this week? Seriously - I do think this thread has went long enough on the impacts of dumping etching solutions - we've all made our points known, and now simply repeating. I should not have commented, Let's have fun and etch some boards!! 73 de Ken H.
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Re: Etching note
2010-06-15 by sailingto