Highlighter Refilling

 

My favorite highlighters are clear with liquid ink so you can see how much is left. When they started to run out of ink, I decided to try refilling them. At first, I tried diluted ballpoint pen ink. Next, I tried printer ink because I got a couple of old printers from a neighbor to take apart. 

The printer ink had to be diluted. I wanted it to be dark enough to show up but light enough to barely cover like a highlighter. I drilled a hole in the back of each marker just big enough to get the tip of a pipette in. After filling the ink reservoir, I sealed the hole with a teflon tape covered screw. This is slightly risky if they don't seal correctly, but none have ever leaked.    

The pink highlighter is refilled with orange printer ink. This was from an unopened cartridge someone was recycling. It's probably for a specialized printer that uses more than the standard CMYK set. The yellow highlighter was filled with blue, then cyan, and then magenta printer ink. The green highlighter was refilled with cyan printer ink. The pink and green will gradually change to the new colors the more they are used.