Copper Etching
Next step is to remove the unwanted copper and let the copper under the toner lining remain. The board with all paper removed. It is OK if some microscopic paper fibers remain on the toner (but remove any fiber from copper), giving it a silky feeling. It is normal that these fibers turn a little white when dry. Manually examine the toner line for any breakage. in case you find any then cover it with the marker( a permanent marker)
Make a hanging tool to itch the copper. twist the plastic coated wire to make a structure as shown this will help in hanging the PCB in Ferric chloride solution(etching solution). The optimal way to etch is keeping the PCB horizontal and face-down (and possibly stirring). This way dissolved copper gets rapidly dispersed in the solution by gravity. Stirring keeps its concentration even, so the solution close to the PCB does not saturate and etching proceeds quicker.
Keep the setup immersed into the etching solution in a plastic container and let it be there for few hours.
Next step is to remove the unwanted copper and let the copper under the toner lining remain. The board with all paper removed. It is OK if some microscopic paper fibers remain on the toner (but remove any fiber from copper), giving it a silky feeling. It is normal that these fibers turn a little white when dry. Manually examine the toner line for any breakage. in case you find any then cover it with the marker( a permanent marker)
Make a hanging tool to itch the copper. twist the plastic coated wire to make a structure as shown this will help in hanging the PCB in Ferric chloride solution(etching solution). The optimal way to etch is keeping the PCB horizontal and face-down (and possibly stirring). This way dissolved copper gets rapidly dispersed in the solution by gravity. Stirring keeps its concentration even, so the solution close to the PCB does not saturate and etching proceeds quicker.
Keep the setup immersed into the etching solution in a plastic container and let it be there for few hours.
Once complete, copper is removed leaving behind the toner lining only, take the PCB out. Rinse the board with plenty, plenty, plenty of water. Store the etching solution in the same plastic box used for
etching. When the job is done put the lid on. To further
minimize risks of leakage, store it in a safe place.
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