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Old 2015-09-20, 4:31pm
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houptdavid houptdavid is offline
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Join Date: Jan 14, 2008
Location: Mostly the doghouse
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Originally Posted by Speedslug View Post
If you have neutralized the liquid with baking soda then You should be able to poor it down the drain unless you are on a private septic system. Then I would poor it into some kitty litter and put it out with the normal trash.
From Non Toxic print making

Washing plates and Safe Disposal
Traditionally, etched plates which have toxic residue on them have been washing in the sink, discharging waste into the water system through drains and sewers.
Electrolytic solutions do not affect the aquifier (the water system) if certain precautions are taken.

However, it is recommended that plates that have been etched using copper sulfate solution be wash in a tank with water and iron filings. The reason for this is that copper ions are converted quickly and easily into metallic copper which is easily disposable and rendered harmless by contact with iron filings. Use a plastic tank or flat tray into which the etched plate will fit comfortably and which is large enough to contain plenty of water. Place some degreased iron filings or a thin piece of steel wire wool (the kind used for polishing that you can buy at any hardware store) into the tank. The tank solution will gradually become yellow in color and it is at this state that you can filter the solution then dispose of it down the drain. The plate can be removed from the tank and rinsed with water in the sink.

Originally Posted by ItsMeSB View Post

Will copper sulfate solution work with brass electroetching as well as copper?

Also you mention "100 grams per liter"... Is that 100g of copper sulfate?
Yes Copper sulfate will work with brass
Yes 100 grams per liter
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