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P&M Services (R) Ltd

Printed circuit board Manufacturer, Photoplotting Established 1964  All types of Pcb, surface mount sm, PTH, SS single     UK Printed Circuit Board manufacturers. UK PCB Manufacture since 1964. single sided SS PCB, PTH PCB, IMS PCB, PCB JPG, DFX PCB

ML multi layer printed circuit board  prototypes. Cheap high quality PCBs Printed circuit boards. Fast cheap UK Prototype PCB

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Nitric Acid:-

Not the safest of chemicals but a simple fast etchent. Often used as a quick fix for removing any remaining copper from a electroless copper tank prior to use.

Adding by weight 2% of Potassium chlorate to a 10% Nitric Acid solution allows it to etch brass. Normal reaction as a copper etchent is:-


3Cu + 2NO3- + 4H+ >> 3Cu2+ + 2NO2 + 2H2O






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