So, let's take a look at the pros and cons of each resin type so you know how to choose the right resin for your project. As a sidenote, there are so MANY different types of resin out there and they are all formulated differently. It's not possible to cover them all but this will give you a general guide to help you understand what each resin is best suited to.
Firstly, let's start with the most readily available types of resin:
- 2-part resins - this group includes Epoxy, Polyurethane (aka urethane), Polyester and epoxy clays.
- 1-part resin includes the very easy to use UV Resins
Epoxy resins are versatile: they're available as either casting resins (meaning that you can pour them into a mould to create objects such as bangles and coasters) or coating resins which are used to coat surfaces such as bar and table tops. Some are formulated so that they can be mixed in small batches for working on small scale jewellery items like pendant bezels. They can sometimes be used as a doming resin too.
Quick Curing Polyurethane Resin
beginner's resin classes.
Most commonly used in the boat building industry as a laminating resin but it's also formulated as a casting resin, making it suitable for jewellery making. Where epoxy and polyurethane resins are measured in a 1:1 ratio, polyester resin uses an MEKP catalyst which is added by number of drops per millilitre/ounce of resin. Working out how much catalyst to add can be tricky - not only do you have to take into account the volume you are mixing, but also the thickness of the casting, the humidity and the air temperature. Too much catalyst and it could flash (ignite) or crack as the resin cures. It also has a very nasty odour so it needs to be worked with outside. But the attraction of polyester resin is its clarity - it is crystal clear, as you can see in this souvenir I picked up in Singapore.
UV Resin - the User-Friendly Resin
These are the most user friendly resins of all because there is no mixing, no measuring: you just pour the resin and then place it under UV light and it cures in about 10 minutes. No odour, no wastage and no clean up. And it is fabulous for doming. You can cure the pieces under a UV nail lamp or in the sunlight. The drawback of this resin is that it is a coating resin so it's only suitable for surface coating or for working in thin layers. You'll find the project instructions to make these fun fridge magnets here.
Epoxy Clay - for Creating Dimensional JewelleryAs the name suggests, this resin is a clay so once mixed together, instead of pouring it into a mould, you push it into the mould or bezel. It's mixed together in equal quantities and can be coloured using dyes and powders. Because of it's strength, it is an excellent adhesive and is perfect for creating pavé jewellery where the crystals will be permanently embedded once cured. It can also be sculpted, sanded and painted, making it suitable for home decor items too. You'll find two gorgeous Pavé-style jewellery tutorials here and here.
Now that you know a little more about the types of resin, use the flow chart below to work out which resin(s) will be suitable for your project.
Download the flow chart and print if off and then have some fun experimenting!
'Til next time.......