Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: [Homebrew_PCBs] Re: Newbie questions

From: "Stefan Trethan" <stefan_trethan@...>
Date: 2007-04-12

On Thu, 12 Apr 2007 01:16:35 +0200, Len Warner <novost@...> wrote:

> It is more hazardous in handling than hydrochloric acid:
> because it not volatile - so un-neutralized splashes get
> more concentrated as they dry, rather than evaporating;
> and also, diluting concentrated sulphuric acid is highly
> exothermic. (Always add acid to water, not water to acid.)


Will it really concentrate? Sulphuric acid is very hygroscopic, should it
not absorb moisture from the air?

But this was not the catch making it unsuitable for me, that much i
remember.

ST