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P.O. Box 1606, Palmer Lake, CO 80133
Tel: (719) 488-9640, Fax: (866) 453-8473
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Peroxy-Sulfuric Etching Module
Getting Things Ready/Recipes

Etchant recipes
Bulk Etchant Recipes
Mix components in the order presented!
Type Component Concentration by volume
A
i
r

a
g
i
t
a
t
e
d
deionized (or distilled) water 40%
35% sulfuric acid (car battery acid) 35%
MFG 244 Stabilizer 5%
Concentrated copper sulfate (35 oz.CuSO4/gal)* 10%
50% (wt.) hydrogen peroxide** 10%
* The addition of copper sulfate to the bath is not strictly necessary since it will form as the primary byproduct of etching copper. Be advised, however, that the performance of the bath will be less predictable until the copper sulfate content approaches 6 oz./gal (48 grams/liter) by analysis
** If 50% hydrogen peroxide is not available, a 35% (wt.) or 19% (wt.) solution can be used. Remember to scale the amount added based on the concentration used (see hydrogen peroxide analysis).
Type Component Concentration by volume
I
m
m
e
r
s
i
o
n
deionized (or distilled) water 41%
35% sulfuric acid (car battery acid) 29%
Electrochemical, Inc. FT-2 Catalyst (stabilizer) 10%
Concentrated copper sulfate (35 oz.CuSO4/gal)* 10%
50% (wt.) hydrogen peroxide** 10%
Generally speaking this bath also works well for bubble assisted etchers, "wave etchers", and some models that employ mechanical agitation of the workpiece.

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