disposal of used etchant

[(doug harrison)]

Something like this could be useful in disposing of expired etchant, maybe a plastic container filled with baking soda, for ferric chloride.

http://www.valleylitho.com/acatalog/Miscellaneous.html
http://www.wcminc.net/products_chemgon.html

[markm]

I save all of mine and bury it every year in celebration of Earth Day! 
The best part is making the Tree-Huggers watch!!