Instructables
Picture of Making resin jewelry
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I did this at TechShop Menlo Park.  http://www.techshop.com

Using resin and foraged natural items we made fun jewelry! You can also make paper weights, fridge magnets, belt buckles, wall pieces, etc.
 
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Step 1: Make molds

Picture of Make molds
I used the vacuum former to heat and form sheets of plastic (from Tap Plastics you can get sheets of Polypropeline) to make molds. I like working with nature so I used pieces of wood, bark and pine cones cut in half lengthwise. I had to cut the pinecones or else the plastic would wrap around them and I wouldn't be able to get them out. No undercuts. I also got one pre-formed mold sheet to accomodate many small resin pieces to be made.

Step 2: List of ingredients

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This is what I got in preparation for casting day: Clear lite casting resin, catalyst, blue nitrile gloves (make sure to not use thin latex gloves as the resin will burn through them and end up on your hands), measuring cups of different sizes,  wooden stir sticks, resin spray and resin dye. All these items are conveniently found at Tap Plastics. I set everything up outside because resin smells toxic and does give off toxic fumes especially once catalyst is introduced.

Step 3: What to cast?

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Once again I love working with nature so I went foraging for natural items. I gathered a bunch of dried leaves, flowers, branches fuzies, grasses, puff balls, feathers, prickly balls, etc..  You can resin cast pretty much anything as long as it is dry. Moist items will interfere with the curing process and with change color when casted. 
I've heard that any resin left uncovered (like in the open top of a mold) will stay tacky and never fully cure. Is that true? How would you keep that from happening?

I have had that problem. I was wondering if this is what the resin spray is used for?

bubelion2 years ago
Love this! Do you know if resin works on any plastic mold?
Miss Cabbit (author)  bubelion2 years ago
No it does not. Sometimes it will become one with the plastic mold and not ever get out and sometimes it is just extra hard to demold. You can always use mold release but it tends to leave a weird surface finish as it bubbles between the plastics. I vacuum form either LDPE (low density poly ethiline) or regular PE. If you dont use a vacuum former, most tuppaware works well and it has some flexibility to make for an easy demolding. I've used bottoms of plastic bottles, sometimes they have fun shapes. It's difficult to demold but possible with some force. Best of luck to you!!!

I've been working on a bottle cap table and I cover it with plastic sheeting to keep dust out of the resin. It doesn't seen to stick to that stuff. I don't know off hand what kind of material it is(maybe vinyl?) but I can say that I bought it from Home Depot in a roll. Maybe in the paint section? I originally bought it as drop cloth for painting. I'll see if I can find out what the material is and the next time I do a pour I'll test to be sure it doesn't stick. I got some resin on it at one point and after it had cured it seemed to just pop off when the plastic was moved.