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I do not understand what you mean by equipment? I use 2 plastic lunch boxes for my developer tank and etchant tank,
then sit them in a bucket of hot water to speed up the etching time. IF the equipment you mean is for this, then it is easy to get.
What I suggest is using pentel-pen or masking tape for the
trace you want to retain for your circuit.
Then Ferric chloride will remove the exposed copper.
Quite useful and impressive info. I have learned a lot from your article and I will keep on reading your sharing.
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