Household ammonia is diluted quite a bit for wax removal. One cup in 5
litres of water is what my bottle of AMEX states for general cleaning.
Yes, Ammonia really smells. You need to be careful not to breathe
fumes or get it in your eyes. Read a hazardous material sheet on it.
Potash is potassium carbonate; it is white I believe.
Potassium permanganate, KMnO4, is a purple crystalline compound with a
metallic sheen. It is soluble in water, in acetone and in methanol,
but it is decomposed by ethanol.
You might try this ethanol test to see if that's what your purple
powder is. After you can have a drink to celebrate!
I have no idea how it (Pot permanganate) might react with copper.
Maybe someone else does.
By the way, ammonia does react with copper, according to my AMEX, "Do
not use with copper or aluminum". I imagine brief contact with dilute
solutions ∗might∗ be ok but I would check with a chemist first to see
what risks if any, exist for human health.
The % of ammonia in Amex is not stated on the bottle. I will check
with the manufacturer next week. They are closed until Tuesday.
Good luck with your project, I am looking forward to hearing how it goes.
Grant
--- In
Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:
> hi
> [snip]
> nobody can answer my question about ammonia?
> someone stated ammonia is good for cleaning the floor polish, please
tell me how much ammonia there is
> in a cleaning fluid. i have no idea. am i right assuming ammonia to
be the stuff which smells so much?
> is this correct? which percentage ammonia is there in a suitable
cleaning solution?
>
>
> for cleaning the cartridge from original ink residue, is it suitable
to use alcohol?
>
> what is best to color the polish for making it better visible?
> i tried the original ink in the cartridge but one would need quite a
huge amount to get it coloring a
> drawn trace enough and i didn't want to dilute excessively.
>
>
> then i thought of the most intense color i had in house. this is "kali".
> it is a cristalline stuff (purple), it was used in the past also for
medical treatment.
> the dictionary sayd pottash is the english word for it but i don't
think this is correct.
> it is a very powerful color, i put in some crystals and they colored
it quite well. i think one has to
> make sure all of it dissolves to prevent it clogging the heads.
>
>
> now i had the idea to use the concentrated color used to color wall
paint (if you buy white one).
> i will try this now.
>
> if anyone has a better idea please tell me.
>
>
> regards
> stefan