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Picture of Rainbow Ring / Regnboga Hringur
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I find circle packed objects compelling to look view and fun to make. Ever since my last trip to Iceland I have been harboring a minor obsession with applying patterns of circles to surfaces of various objects.

Perhaps it's the combination of the volcanic stones, the bubble chambers in caves I visited, and the magical feeling of the whole place. I don't know what it is about the environment there but it really drew me in and I can't get it out of my head.

I've given these patterns an Icelandic name - hringpoki - which means circle or ring packed or bagged. It's much more fun to say and carries a little more meaning (at least to me).

And that's what eventually lead me to this Instructable. That and Steven Gray who suggested that I look into putting some resin in one of my hringpoki objects.

I decided to make a little project out of this experiment and create a special hringpoki ring for my wife for Mother's Day - on May 10th in the US. I ran into some issues designing the ring, and then there were some production delays from the silver casting service, and then there was a PEBCAK error which delayed things until it was finally ready on June, 1st.

So, even if you don't make a hringpoki ring but some other object where you plan to use UV resin, you might want to read this anyway if only to not repeat my mistakes.

Step 1: Design Your Ring

Picture of Design Your Ring
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Easier said than done but it's really not that hard to make a basic ring in any 3D modeling program. It's particularly simple in Rhino because all you need an a circle with the inside diameter a little bigger than the size you want. You want it a little bigger because when you cast an object it tends to shrink slightly. The computer size is the "ideal" and the casting is "reality" so unless you're just making ring for a computer environment, you'll need to fudge the numbers a bit if you want the ring to fit in real life.

If you mess up you can always get a ring stretcher. That's a last resort though.

I made a different ring using a similar technique for myself decided that the new ring would be a little less wide and have more of a profile curve like a dome style wedding band.

To make my ring I started with a circle and an idea of how I wanted the outside profile to look. Then I used the Sweep1 command.

More detailed Rhino instructions are available on this instructable. YouTube videos are also a great resource.

redwolfoz made it!2 months ago
Love this. I made a glowy one. Meet Constellation.

Thanks for the inspiration!
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Joy Complex (author)  redwolfoz2 months ago
That is really great! Love that glow shot!!
owenkkelly3 months ago
Well played, very well played.
Step zero, last item
Joy Complex (author)  owenkkelly3 months ago
"Why build one when you can have two at twice the price."
;-)
BrianM6063 months ago
Just for clarification, do you fill one depression with resin, cure that, then fill one depression with resin, cure again, and so on? Or is it possible to fill multiple depressions between each curing step?
Joy Complex (author)  BrianM6063 months ago
You can do a few of the depressions at one time BUT the larger the depressions the less likely that the surface tension of the resin will keep it in the hole. So for some parts of the ring I just did one hole at a time. It’s not so bad with the UV chamber but if you are just using sunlight, it could take a while to complete.
chardwick3 months ago
Very cool! Might be tough for people with Trypophobia :))
Joy Complex (author)  chardwick3 months ago
Thank you. Definitely heard that before! Especially with the bubble baubles I've made. http://bit.ly/2RjRlc6
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jessyratfink3 months ago
Really interesting technique :D
Joy Complex (author)  jessyratfink3 months ago
The resin application is definitly something for patient peopel!
This is awesome! I just love it :)
Joy Complex (author)  Penolopy Bulnick3 months ago
Thank you very much! I am pleased with how it came out. The resin was a little fiddly to get in all the holes in teh ring but It really looks nice when it's done.