Squink Insulating Ink Cartridge
A cartridge of Insulating Ink. It contains enough ink to print around twenty-five 3.5" x 3.5" dual-layered circuits.Shelf life: 6 months (keep at ROOM TEMPERATURE)
Use exclusively with the Advanced Ink
The insulating ink works hand in hand with the advanced ink to create multilayered circuit boards.
See some examples of multilayered circuits here.