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The Saltwater etch process

Step 2Score a line on the copper

Score a line on the copper
Hold your ruler or straightedge firmly down on the board. Hold a knife lightly and draw across the line many times.

After some time, there will be a gouge on the copper, dividing it into two.

If you bear down with the knife, chances are that it might wander and cut the board deeply where you do not want it cut - and you will be looking ruefully down on your ruined PCB stock. Be patient. Being patient has its own virtues, as life will invariably teach you.
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Author:neelandan
Employed as an Engineer in Electronics. Interested in building small circuits around tiny chips (the electronic kind).