Stefan Trethan wrote:
> On Sun, 21 Aug 2005 22:10:56 +0200, lcdpublishing
> <lcdpublishing@...> wrote:
>
>
>>hydrogen peroxide (H2O2), is this the same as what I can purchase at
>>the local drug store? Or, is there a stronger solution or something
>>I have to get at a specialty supplier?
>
>
> often the drug store stuff is only 3%, you want around 30% or you add too
> much water.
>
>
>>hydrochloric acid (HCl), I know I have seen this for some purposes
>>but can't recall common uses - toilet bowl cleaner perhaps? Again,
>>where would I purchase this, and is there a certain strength I
>>should look for?
>
>
> Around 30% is a common strength again, it has many uses, cleaning stuff
> like bricks, toilets, ...
>
> I get both chemicals at my chemists shop. I don't remember the price
> exactly, but it is well below 10eur for a liter each, and that lasts you
> quite a while.
>
>
Another possible place to get > %10 H2O2 is a hairdressers supplier. I
think the one near me sold it up to 18%. Anyone had problems with this
stiff decomposing over time ?