Difference between revisions of "Chemical Etchants"

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== Ammonium Persulfate ==
 
== Ammonium Persulfate ==
 +
 +
== Sodium Persulfate ==
 +
More environmentally friendly than ferric chloride.  Can monitor the etching as initially clear new etchant solution turns blue from the copper ions.
  
 
== Disposal procedures ==
 
== Disposal procedures ==
 +
* [http://www.kepro.com/fmc4.htm Kepro Circuit Systems] Removal of Copper and Persulfate from
 +
Spent Sodium Persulfate Etchant by Precipitation
  
 
== External Links ==  
 
== External Links ==  
 
* [http://www.k9spud.com/wiki/PCB:Etchants Ferric Chloride vs. Ammonium Persulfate] and other etching chemicals.
 
* [http://www.k9spud.com/wiki/PCB:Etchants Ferric Chloride vs. Ammonium Persulfate] and other etching chemicals.

Revision as of 22:13, 19 June 2006

Ferric Chloride

Ammonium Persulfate

Sodium Persulfate

More environmentally friendly than ferric chloride. Can monitor the etching as initially clear new etchant solution turns blue from the copper ions.

Disposal procedures

Spent Sodium Persulfate Etchant by Precipitation

External Links