Looks like ammonia per-sulphate,that turns light blue when mixed with water,and its more environmentally safe. Don,t mix it all if you buy it only mix enough for the job Sent from my iPad
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Re: Etchant Identification
2012-09-24 by Edward Brown
Yahoo Groups archive
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2012-09-24 by Edward Brown
Looks like ammonia per-sulphate,that turns light blue when mixed with water,and its more environmentally safe. Don,t mix it all if you buy it only mix enough for the job Sent from my iPad