Victor: You have SO much of all reactants, that increasing any one will likely not give you a noticeable change. Suggest you try adding SMALL amounts of chloride. Try making a 10% solution of salt (sodium Chloride), initially add 1 drop to your mix, adding ammonia, then salt solution, then peroxide.
If no results, add two drops salt, then 4 drops, then 16 drops. Peroxide and chloride can give you some highly unpleasant results, so I recommend starting with small amounts, and increasing slowly.
Rudy Sedlak (a card-carrying chemist!)
RD Chemical Company
--- On Mon, 1/16/12, Victor Hernandez <[log in to unmask]> wrote:
From: Victor Hernandez <[log in to unmask]>
Subject: [TN] Copper etchant, 1:1:1
To: [log in to unmask]
Date: Monday, January 16, 2012, 9:20 AM
Folks,
Is there a real chemist out there or someone very knowledgeable of etchants?
DI water 10ml
Ammonium Hydroxide 28.0 - 30.0% 10ml
Hydrogen Peroxide 35 10ML
Polish, 6, 3, & 1 micron
Final polish 0.05 Alumina suspension
3 -5 seconds, flush with water
Which of the two chemicals would I increase volume to get stronger delineation/demarcation region of plated copper. The process being equal will not yield the same etchant quality. The variable is the quality of overseas copper suppliers.
Victor,
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