F.A.Q.

The resistance of the ink averages 1 ohm for a 1 cm line. However, the resistance can vary depending on the paper that you are writing on.

We see about 1 ohm per cm on standard copy paper and 0.5 ohms per cm on photopaper.

Our conductive ink pen is unique because it contains about 20% pure silver by volume, so it acts a little differently from a normal pen. The dense silver particles tend to settle to the bottom of the pen after sitting for more than 24 hours, but they will re-disperse if you shake lightly, draw for a few minutes, or simply carry the pen around in your pocket like we do!

If the ink settles, it is common for the pen to look half-full. However, the pens ship with 1 ml of ink, and if you lightly shake them that entire volume will look full. There is also a white ball at the top of the ink column that indicates the ink level.

An unopened pen has a shelf life of about a year. Once it’s open, the pen will write smoothly for at least 6 months. After that time, the tip might dry out, but you can scribble on a damp paper towel to get it working again.

We do not currently sell refills, but new pens are available for purchase on our shop.

The ink is optimized for use in rollerball pens. Our parent company, Electroninks, manufacturers inkjet printable inks and might have an ink to suit your needs. Check out our industrial ink section for more info.

If any of the modules in your kit do not work upon opening, we will gladly send a new component free of charge. If for any reason you are dissatisfied with your kit, we will accept your kit for a full refund within 90 days of purchase.
Contact hello@circuitscribe.com for additional return info.

Our modules are rugged. If one breaks under normal use, we will replace it. We also will replace any pen that won’t work due to manufacturing defects. (This does not include running out of ink.) Contact hello@circuitscribe.com for additional warranty info.