Does anyone have any quality information on ammoniacal etching or know 
     of a good source?
     
     Manuals and training documents (or information on future training 
     sessions) covering the control aspects of etching (new technologies 
     are welcome) as well as general practice would be appreciated. 
     
     Also, if anyone has controls on their ammoniacal etcher that they feel 
     are excellent (or doing an above average job) please feel free to drop 
     me a line. 
     
     Thanks,
     
     Chris Abeles
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     So far we have been using Macdermid etchant and I personally do think
     that their manuals and training documents are the best I have ever
    seen or read .

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