I use a Sakura Micron Pigma 01 black pen to draw my zentangles/zia. I tried to buy one at Michael's but couldn't find one. I chose a similar pen but after I got it home, realized that it was blue. I checked online for the Sakura pen and found what I needed but the shipping was just CRAZY. After some frustration, I thought I remembered that JoAnn's carried them. I checked and bought the last two. And with coupons, they were an amazing price.
I downloaded another mandala pattern from free-mandala.com to use for my tangling. I started out with the black pen but the patterns got so dense, that I used the blue to spice it up a bit and then added some shading with blue pencil. It kinda took on a life of its own. The whole thing reminds me of bristle hair curlers, barrettes and rubber bands. Or maybe those Chinese finger puzzle things. Any other ideas?
Hope you have a good day.