[Ronja] Twister2 power problem

[Karel Kulhavy]

---- Tomasz Koprowski <klapek at kki.net.pl> schrieb:
> On Tuesday 25 of March 2008 15:20, Bruce M Simpson wrote:
> 
> > > Maybe you can buy hydrochloric acid in a drugstore and nails at an
> 
> (...)
> 
> > It's funny you mention it, this sounds very similar to Tom Gootee's
> > etchant solution, 1 part H.Cl. to 2 parts H202:-
> 
> (...)
> 
> I was wondering how do you dispose of your etchant after use? Some of the 
> etchants that can be bought in electronic stores are really NastyStuff(TM) 
> and shouldn't be simply poured down the sewer.

It consists of chlorine and iron atoms and water. Both occur in normal
water naturally. Chlorine atoms occur in large amounts in table salt,
iron atoms release from steel pipes.

CL<