The ink from the pen is etch-resistant so you have a quick and simple way of making a PCB! Being waterproof it is also great for labeling things on or about the boat, caravan or motorhome.
The ink will wash off afterwards with metho, turps, etc.
•   Excellent smudge-proof and waterproof qualities
•   Dries in seconds
•   Low-odour ink
•   Xylene and toluene-free ink
•   Line width fine approx. 0.6 mm
•   Blue