Project: Conductive Ink (Part 1)

I got it into my head that I'd like to DIY a circuit-writing pen. This is Part 1 of the project, the first run at making a copper pigment. I thought I'd start with easy methods and document the improvements. This is a really easy chemistry experiment suitable (IMO) for classrooms, garage chemists and hobbyists.

Materials
copper sulfate II pentahydrate (CuSO4·5H2O)
ascorbic acid (C6H8O6)
water
Equipment
beakers x2
mixing spoon
water kettle

Based on a How To video by Robert Murray-Smith. https://www.youtube.com/watch?v=9iyRUBvd260

Видео Project: Conductive Ink (Part 1) канала opendna