Help with pcb etching

You can use hydrogen peroxide and hydrochloric acid to etch

>>1043458

Copper chloride. By far my favorite. It's extremely cheap, works well, and never needs disposal.

http://techref.massmind.org/techref/pcb/etch/CuCl2.htm

>>1043459
This. Peroxide allows the HCl to dissolve the copper on the board, which normally happens at a rate way too slow to be useful, and the resulting green solution is one of copper chloride, which is also a good etchant, as >>1043460 said.

>>1043460
This is beautiful. Too bad I don't have time to diy anything anymore.

Hydrogen peroxide + lemon acid + salt.

>>1043520
That sounds like it'll take forever.

Can you buy ammonium persulphate?

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Get 2 iron nails.
Get 9V battery.
Get 2 peaces of wire.
Get table salt.
Get water.

Put salt in to water until it will no longer dissolve.
Tie one end of the wires to nails.
Tie the other ends to battery leads.
Put nails in water with salt in it.
Leave over nigh outside.
What you get in the morning is a solution of FeCl3 and NaOH.
Evaporate the water.
Add vinegar to neutralize NaOH
Use resulting solution as is.


How it works is:

The salt water solution can be broken down using electrolysis to form chlorine and hydrogen.
The hydrogen simply leaves the solution as bubbles. However the chlorine is corrosive enough to eat away at the iron nail. Making ferric chloride. However the result of the breakdown on the other electrode (nail) is NaOH. FeCl3 isn't acidic enough to neutralize it so they just both kinda sit in solution. When you add vinegar NaOH becomes NaCOOH and water.
Leaving you with a FeCl3 and NaCOOH solution. NaCOOH wont effect the etching solution so its safe to ignore.

>>1043670
>FeCl3 isn't acidic enough to neutralize it so they just both kinda sit in solution.
This is total bullshit. Ferric chloride and sodium hydroxide react immediately and you'll get (solid) ferric hydroxide/oxide.
>NaCOOH
That would be sodium formate, not acetate.

>>1043458
>i'm in italy and ferric cloride can't be sell

Eh?

https://www.amazon.it/MG-Chemicals-Ferric-Chloride-Liquid/dp/B018V10VNK