derekhawkins wrote:
>>Yes, but it will only etch so much copper than then no more
>
> The disposal of spent Ferric Chloride has generated several posts in
> newsgroups. From the mixing with washing soda first to the mixing with
> cement before disposal in the garbage. Out of curiousity, how many of
> us here just flush it down the toilet (and clean the bowl afterwards)
> or pour it down the drain with lots of water? I have about two gallons
> of it in the garage along with about 20 gallons of used engine oil and
> transmission fluid. Waiting for the getup and go to cart them all to
> the recycling center.
I found that FeCl saturated with copper is ∗highly∗ toxic to grass, and
probably most other plantlife, tho the grass does recover after a few
weeks;)
I'd save it for use in a weed sprayer bottle;)
They also sell "root rot" tablets made of copper penta-hydrate for unblocking
toilet sewer pipes, so flushing some used etcher occaisonally will keep
your dunny flushing;) Copper and iron is all natural;)