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Ammonical etching is used to etch the copper from the PCB and to form a printed circuit without attacking circuit tracks.
Rapid Etch 175
Rapid Etch 175 is a unique efficient system for copper etching from printed circuit boards.
Rapid Etch 175 is an alkaline process which effectively protects circuits tracks covered with Tin or Solder deposit without under cutting the circuit tracks. The system assures the conductor width within the normal specification limits.