Hacked Gadgets Forum

April 11, 2011

Hydrogen Peroxide, Distilled White Vinegar and Salt as a PCB Etching Solution

at 11:06 am. Filed under Electronic Hacks




Looks like there is a new DIY PCB Etching Solution. If you have some Hydrogen Peroxide, Distilled White Vinegar and Salt you are ready to give it a try.

Via: NBitWonder

“Vinegar – Distilled White Vinegar – diluted with water to 5% acidity (Meijer)
Peroxide – 3% solution (Meijer)
Salt – to taste. (Just keep adding it until the “fizzing” continues all by itself).

Hydrogen peroxide is what we call an oxidizing agent (a mild one), meaning that it easily accepts electrons from other species to form H2O (hydrogen peroxide itself is electron deficient). What happens when it “dissolves” copper metal is that a neutral copper metal atom releases two electrons, to form a Cu2+ ion in solution. All metals tend to release electrons to form positively charged species….we refer to anything that DONATES electrons as a reducing agents. The strength of metals as reducing agents varies and copper is a fairly weak reducing agent.”


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9 Responses to “Hydrogen Peroxide, Distilled White Vinegar and Salt as a PCB Etching Solution”

  1. Gh0sTly Says:

    thats amazing. that makes etching at home a whole lot cheaper!

  2. MbbNEON Says:

    Just use Hydrogen Peroxide (10-30%) and Hidrochloric Acid (10%), much easier.

  3. peroxidestabilize Says:

    Hydrogen peroxide becomes less reactive in acidic species, and is therefore usually shipped in a weak acidic medium to prevent decomposition. It may be far more effective to destabilize the H2O2, using a base such as sodium Carbonate or Sodium Bicarbonate or Sodium Hydroxide, sold as Baking soda, Baking powder and Caustic Soda respectively.

    Source – derived from Shumb, Satterfield, Wentworth ASC Monogram 128 “Hydrogen Peroxide”

  4. Whatnot Says:

    I once did an experiment with peroxide and found that the bottle said that once opened it had to be used quickly since it becomes useless in a short time.
    That’s something that’s a bit annoying I find, because you need to do everything in one go and I don’t like to be rushed.

  5. Sparticus Says:

    I tried this for my first PCB etch. it works. took 3+ hours for 3×5 in board

  6. LeRoy Olson Says:

    I have just tried the recipe and it works extrtemely well. I made two boards to hold ATmega128 64 pin SMD chips for my proto type board. The etching took les than an hour and thjey turned out excellent. I add salt untill it started bubling like an Alkaseltzer. It is great Thank you LeRoy

  7. cjh Says:

    BTW: What is the by-product of this process? Is it toxic? What is the BEST way of disposing of it?

    ;-> (cjh)

  8. Hacked Gadgets Easter Egg Hunt - Hacked Gadgets – DIY Tech Blog Says:

    […] The page the Easter Eggs were on was Hydrogen Peroxide, Distilled White Vinegar and Salt as a PCB Etching Solution […]

  9. eaglecj Says:

    How to accelerate the etching process and how to dispose the etchant after use???

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