Warning: Re: etching aluminum?

[bj]

Prof. Antonio Guerrieri wrote:
> 
> THE READING OF THE FOLLOWING IS HIGHLY RECOMMENDED
> 
> Someone wrote:
> 
> >> Guess : try H2SO4 (sulphouric acid ?), NHO3 (nitrogen acid ?), mixture
> >>out of both.
> >> A mixture out of both acids will disolve even gold !
> 
> Boys,
> 
> electronics is electronics and chemistry is chemistry.
> 
> The use of strong acids or the mixing of chemicals is not like the
> soldering of a CMOS.
> 
> If you do some mistakes in soldering or connecting electronic components,
> the worst thing you can expect is something like lose money.
> 
> IT IS NOT SO WITH CHEMICALS!!!
> 
> Be careful with chemicals, expecially with strong acid like sulphuric acid:
> H2SO4 reacts in an inexpected and violent way even with water so the use of
> proctetive wears (gloves, glassses, ..) is strongly recomended.
> 
> Mixing acids or acids and bases is dangerous too!!! Mixing strong acids
> very often give up the evolution of dangerous gases.
> 
> That's all.

That's not all, if you mix them in a wrong order thay might 
react so strong that it explode..

BJ