There are a few things to consider for a good ink/etch solution for making PCBs using a pen plotter:
1. Ink selection: Choosing an ink suitable for use with a pen plotter requires the ink to have good permeability and stability, and be able to dry quickly on the paper and form a uniform circuit pattern.
2. Etching liquid selection: Select an etching liquid suitable for use with a pen plotter. The etching liquid is required to have good corrosiveness and stability, and can accurately transfer the circuit pattern to the PCB board.
3. Plotter accuracy: Using a high-precision pen plotter can ensure the accuracy and consistency of circuit patterns, thereby better controlling the PCB board production process.
4. Operating skills: Mastering correct operating skills, such as controlling the strength and speed of the drawing pen, mastering the amount and time of etching liquid, etc., can produce more sophisticated PCB boards.
To sum up, a good ink/etch solution for using a pen plotter to create PCBs requires choosing the right ink and etching fluid, and mastering the correct operating techniques while maintaining the accuracy and stability of the plotter.