Homebrew PCBs

I found a formula for tin-copper alloys that I would like to try, consisting of: Distilled water or methanol, 100 ml; Hydrochloric
acid, 5-25 ml and Ferric chloride (powder) 10 grams.

Can someone here correlate grams of the powder to milliliters of (MG Chemicals 415) solution, (Ferric Chloride 40% by weight,
Hydrochloric acid 1% by weight - 5ppm)?

Being totally chemistry ignorant, and as I already have the liquid solution.

TIA for any enlightenment on this.

Regards,

Roger

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of Stefan Trethan
Sent: Tuesday, December 22, 2009 9:44 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Looking for a photo etching vendor

 

  

People might be reluctanct because of the tin in the bronze. I'm not
sure what it will do, but I'd avoid putting anything other than copper
in my etching tank.

You can always try with a one-time use small batch of etchant first.
HCl and H2O2 (3% dilute) will do the trick.

ST





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