Waste free etching of printed circuit boards, plating up copper tracks скачать в хорошем качестве

Waste free etching of printed circuit boards, plating up copper tracks

In response to Nurdrage's video:    • Recycle Copper chloride PCB etchant (waste...   This video shows the removal of 90+% of the copper in a single electrolytic process leaving very little to be removed by "pickling" chemicals. This has the added advantage of producing bare PCBs with thicker copper, ideal for high current power applications, thermal transfer or if you need thicker copper for impedance matching. This process can be carried out with the absolute minimum of chemicals. Old battery acid could be used as the source of sulphate, and copper from etched PCBs can directly be used to produce the copper sulphate needed for plating. Along the lines of Nurdrage's video here, but using a PCB that you wish to etch as the anode.    • Make Copper Sulfate from Copper and Sulfur...   If using the elecrolytic method to make your copper sulphate, and you are etching at the same time, limit the voltage to about 1v, since higher voltages will tend to damage etch resist agents. With the electrolyte as shown, electrode spacing 10mm, at 25 centigrade, 0.6v, you might expect standard 1/2oz copper PCB to electrolyse in about 30 minutes. Whilst the sulphuric acid used in the electrolytic reaction is fairly dilute, battery acid is quite concentrated and can cause serious burns. Do not attempt this without some knowledge of chemistry and knowledge how to handle corrosive chemicals safely.