While optional, these steps make for a MUCH better PCB. Tinning is performed to tin the copper to prevent it from corroding and to also aid in the soldering process. Paint is applied to the top surface so that the legend (letter) engraving stands out and is readable. Plenty of tips are offered to make this a reliable process.
This is the ninth video in a 12 part series about how to make Printed Circuit Boards (PCBs) at home. This series will cover most of the tasks involved in the entire process from design to completion.
Cheers!
Chris
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