r/ResinCasting • • Oct 09 '13

What the heck is Resin Casting anyway? What can it do for me?

248 Upvotes

Welcome, acolytes, to the most ancient and reverred craft of the resin caster!! This won't be a technical article, just a quick Q&A introduction to the process and what it means to those who do it.

Useful Link: An excellent introduction to some of the technical processes, by Michal Zalewski

Introductory Q&A:

Q: So, what is resin casting?

A: Very simply, resin casting is the process whereby we take an object we wish to duplicate, make a mould of it in flexible silicone rubbers and then cast copies of the original object from that mould as many times as we like.

Q: Why would I want to do that?

A: Because casting the object may be quicker and easier than making another copy from scratch. It can also be less costly.

Q: What industries use this process?

A: A huge number, but the ones it's likely that you'll have seen every day include film and TV props, scale models and figures, even some medical process use resin casting tchniques.

Q: Is it hard to learn?

A: Not really, but you will progress to a professional level much more quickly if you're part of a community like this one. Lucky you!

Q: It expensive?

A: It depends. You can buy starter kits like this one for not much and get started right away. if you want to produce large number of copies of complex objects, then there is some specialist machinery you will need that requires some investment. But we'll cover that later.

Q: Can I do it at home or in my garage?

A: Absolutely!! Many multi-million dollar companies with whom I have worked started off in spare rooms or garages. The beauty of resin casting is that it's cheap to get started and you can make money quickly if people like what you make. It isn't smelly or messy if you do it properly, just make sure your work area is well ventilated.

Q: Can I only use Epoxy Resins in silicone moulds?

A: No there are lots of other materials you can use to cast. You can cast in plaster, wax - almost anything that turns from liquid to solid at more or less room temperature - you can even cast chocolate in food grade rubbers (yum!!) Also you can add metal, ceramic, rock and all sorts of other poweders to resin to achieve some really cool effects. Using high temperature silicone you can also cast in pewter and other similar metals. But pewter and resin casters generally do one or the other, as each requires a lot of practice and skills to get right.

Q: Can I make stuff and sell it?

A: You bet your gosh darned rear end you can! If you're good at making things, and want to make copies to sell then this process will allow you to do that quickly and economically. I personally know many people who have doubled their income just by casting a few evenings a week - though most can't resist the tenptation to go full time and start their own business selling what they make.

Q: So this could be a real source of income?

A. Yes, once you're good enough to cast quickly, consistently and to a high standard you're ready to go and find people who want to buy what you've made. The internet means that the whole world is your marketplace, and personally sell things I make to nearly a dozen countries. This is GREAT especially if you want to work from home and live where you want, and it's also removes your dependence to your local economy to a large extent.

Q: Ok I've made stuff, where do I sell it?

A: Anywhere. Ebay, your own website, events and shows, retail shops - someone will want what you're selling somewhere.

Q: I just want to do ths for fun, I don't want to turn it into a business.

A: That's also fine. Do with it whatever you will!

Q: I have items that I bought that I want to copy, can I?

A: If you're going to sell the copies, then you may be breaching copyright. If you are recasting something that another maker/caster has made then you are a bad person. Don't recast. Ever.

Q: I'm a wargamer, I want to copy my Space Marines so I don't have to buy more, can I do this?

A: Bad recaster! Bad!! Also, to cast to the same quality as the plastic you get in the box requires serious casting gear - in the end you won't save any money and it's easier to buy more originals. If you can do it, you're better off making your own minis anyway.

Q: Can I cast large objects like gun props?

A: Yes, but the amount of material you need can make it expensive to do. But it's perfectly possible.

Q: What's this special equipment you mentioned?

A: When you wan to take your casting to the next level, you'll need a vacuum degassing chamber and vacuum pump to draw air bubbles out of your moulds and casts when they're wet. Some people use a pressure pot to crush air bubbles in the resin when they cast - both vacuum and pressure casting has pro's and cons which I'll go into one day.

Well folks that's as much as I can think of on the fly, please ask if you have any more questions - think of it as an AMA. I'm also happy to answer questions about myself and my business.

Cheerio :)


r/ResinCasting • • 59m ago

My friends and I kept struggling to make molds for our small 3D and composites projects, so we built a tool to generate them

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• Upvotes

r/ResinCasting • • 12h ago

Just looking for some honest feedback from the community. What do you guys think of this stash box? Anything you'd change or improve?

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0 Upvotes

r/ResinCasting • • 18h ago

Ok. Dino number 3!!!

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2 Upvotes

Gunna do this in silver... jw what yall think of the design?? Yall liked my nepehews pendants but curious what u think


r/ResinCasting • • 1d ago

Self skinning foam skeleton/insert

1 Upvotes

I'm looking into molding some stuff with self skinning foam. Think like armrests for chairs and stuff but I want them to have integral mounting equipment. How would I go about molding something with a skeleton inside it so it's not just a plain old pad. Is there a specific way to do it where the in molded peace won't shred the inside of the foam?


r/ResinCasting • • 2d ago

My first try at making an encased broken liquor bottle and sealed with epoxy!

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113 Upvotes

r/ResinCasting • • 1d ago

I'm a completionist...how to get to max?

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1 Upvotes

r/ResinCasting • • 1d ago

Hi everyone a friend gave some resin dye. It marked as UV dye, is it ok to use if I don't have UV.

1 Upvotes

r/ResinCasting • • 2d ago

Resin

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0 Upvotes

r/ResinCasting • • 2d ago

Red-splashed ghost

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37 Upvotes

r/ResinCasting • • 2d ago

Eco-resin blend casting material - AquaCast

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9 Upvotes

This is an eco-resin blend casting material called AquaCast I got my hands on a while ago and tried a terrazzo finish. This was my first attempt with this stuff! Hope you like it.


r/ResinCasting • • 2d ago

Navratri Jumkha

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1 Upvotes

Navratri Jumkha made with resin. This can sf sparkle to you Navratri look ..


r/ResinCasting • • 2d ago

My resin cast inkwell for 5ml sample tubes

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4 Upvotes

Cross posting here to see if anyone has any tips for the process. I had a single bubble cause a chip near the top. The hardener was exposed to sun which caused it to yellow. Not a bad effect for this piece. That bottom (which was cast on top) has a razor’s edge.


r/ResinCasting • • 3d ago

Really proud of this wall art piece

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50 Upvotes

r/ResinCasting • • 2d ago

Football season

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0 Upvotes

So I'm doing the college teams. This is my first time doing clocks.


r/ResinCasting • • 3d ago

How do you keep epoxy resin curing consistently when the temperature drops?

3 Upvotes

I've been looking into how much room temperature affects epoxy resin curing, especially with taller molds or pieces that have different thicknesses.

I know the resin type, mixing ratio, and recommended pour depth all matter, but I'm curious how much of a difference a stable curing environment makes in practice.

For those who make resin pieces regularly, do you just let them cure at room temperature, or do you use a temperature-controlled setup or curing machine?

Have you noticed a real difference in curing time or consistency? I'd be especially interested in hearing what works for taller molds.


r/ResinCasting • • 3d ago

This Guy Needs A Name

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10 Upvotes

Just pulled this test run of a new figure, Still to be named. This guy is made out of components from Halo, Pokémon, Mario, DBZ, Alien, predator, etc. I think I'm gonna call what I've been doing recently figure sampling because I'm taking little snippets and parts of other things and recontextualizing them into something new


r/ResinCasting • • 3d ago

Polyurethane resin casting?

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1 Upvotes

I'm looking into duping a part for my gunpla model that I broke. I'm not too sure what I'm looking for exactly but the "smooth on" brand task 4 resin has caught my eye for this. I'm primarily looking for low viscosity and long pot times so that I can vacuum chamber out the air bubbles and still have working time left as well. I currently plan on using "silinot" for the mold. Any suggestions or insights would be very much appreciated!


r/ResinCasting • • 4d ago

Resin Floral Orb Craft by Artsy Sister Teresita Blanco

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0 Upvotes

r/ResinCasting • • 4d ago

reusing SLA print supports

1 Upvotes

In my on going quest to make my 3d printing as close to zero waste as I can manage (Motivated more by my wallet) I'm trying to figure out if it is possible to grind up the cured supports from my SLA printer and mix them in with two part epoxy for casting bases for miniatures.


r/ResinCasting • • 4d ago

Looking for a durable, weather resistant, resin for outdoor use.

3 Upvotes

I've got a DIY project I'm working on and I could use some advice.

We're repairing the ornamental railing on the outside of my parent's old house right now. That kind of pointless ornamentation some old houses have along the edge of flat portions of the roof. Specifically these are little onion shaped wood topper bulbs screwed into a wood beam that runs along the edge of the roof.

Originally they were wood, but this is in Texas and the weather here has a tendency to just destroy any wood that isn't properly treated. And these delicate little wood onions didn't stand a chance. I'd personally just leave them off or find something similar pre-made in polyurethane or similar, but there's a historic society thing happening here and I have to replace these with identical decorations.

I've done some resin casting in the past, and I got the idea that maybe I can make a mold of these little ornamental things and cast in a extremely durable resin. But I'm not sure what kind of resin would be the best fit for these.

Can anyone recommend a really tough resin that can withstand intense heat and rain? They'd be painted.

Thank you.


r/ResinCasting • • 5d ago

Recent project- fountain pen.

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8 Upvotes

r/ResinCasting • • 5d ago

What type of epoxy do I use?

2 Upvotes

What is the best brand/type of epoxy to use for silicone casts of trinket dishes, bowls, small vases?


r/ResinCasting • • 5d ago

[Commission] Looking for a custom coaster: The "Thermochromic + Glow" Challenge (Shipping to France)

2 Upvotes

Hello talented makers!

I’m looking to commission a single, custom resin coaster for my desk setup. I have a very specific concept in mind. I’m not a resin artist myself, so I don't even know if combining these two effects is chemically or physically possible, but I think it could be a really fun mini-project for someone who loves experimenting.

The Concept: A dark/black coaster that reacts to the heat of a coffee mug to reveal a glowing core.

How I imagine it working:

  1. The Base (The Core): A pour of either a Galaxy/Space theme OR a flowing Lava theme. This layer needs to use photoluminescent (glow-in-the-dark) pigment.
  2. The Top Layer (The Mask): A thermochromic black resin layer covering the base.
  3. The Effect: When the coaster is at room temperature, it looks like a sleek black slab. When I put a hot mug of coffee on it, the heat turns the black layer clear, revealing the vibrant, glowing galaxy or lava hidden underneath.

EDIT: Or maybe we could consider the exact opposite approach? For instance, putting the glow-in-the-dark layer on top so it charges easily in ambient light, and the thermochromic layer underneath, which would turn clear from the heat to reveal a hidden base.

The Specs:

  • Needs to handle the heat of a standard hot mug safely without warping or melting.
  • Around 11-13 cm (4.5 - 5 inches). Shape is up to you (round, hex, square).
  • A cork or anti-slip base would be amazing to protect my fabric desk mat.
  • Budget: Around $40 for the coaster, plus tracked shipping to France. (Please note that I cannot afford endless extra fees and have a strict ceiling for the total overall cost. We'll just need to check the shipping estimate early on to make sure it stays reasonable!)

EDIT 2: Another breakthrough idea! Instead of stacking horizontal layers (which blocks light or heat), what if we distribute the powders spatially on the same plane? We could use the glow-in-the-dark pigment for the main parts (like a galaxy spiral or lava flow) so it stays exposed to ambient light all day. Then, we intermingle thermochromic pigments for the finer details (like subtle veins, dark asteroid belts, or thin lines). It doesn't need to be a massive color shift—just subtle grooves or details that react to the hot mug and reveal themselves alongside the glowing parts. Does mixing the powders this way make the project more realistic to craft?

Does this sound like a fun challenge to anyone? If you think you can pull off this "heat-reveal glow" effect, I'd love to see some of your previous work!


r/ResinCasting • • 5d ago

Fresh from the mold

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6 Upvotes

I did this with sheets of plexiglass. I rubbed paraffin on the plexiglass and wiped it off until it was clear. That leaves a thin film of wax. The plexiglass popped loose once I got a blade stared under the corner. It needs some work on the top and side but I think it came out pretty good. There wasn't much helping the line between first and second pour. It had to be solid to hold the medallion. Thinking back just now though I could have suspended it... I didn't wait for it to set up completely between the second and third pours and the line is much less obvious and for some reason looks mountainous.