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01 Mar 2011 - 20:3351429
Making Moulds
I want to make some of the jewels/decorations for some of my costumes, because I can't find what I want. I was thinking of using a casting of resin, but I'm stuck on how to make the moulds. Is it okay to use something like this:
http://direct.hobbycraft.co.uk/products-FIMO-Classic-1-Violet-56g-1.97oz_7534.htm
to make the moulds? or do I need something more specific?


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01 Mar 2011 - 22:5351445
The problem is that depending on your resin depends on what type of material the moulds can be made from. Latex or silicone are your best bet because you need them to be flexible so you can pop the gems out, but some resins won't set in latex or silicone. If you let me know what sort of thing you were thinking of actually casting in I could find out what actually works for that.


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01 Mar 2011 - 23:0951446
Just do a silicone block mold like this
it'll last for ages and you can whack loads of gems out of it

http://www.youtube.com/watch?v=RegGZR5SL3c


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My God. Its full of stars
02 Mar 2011 - 18:1351489
Quote KhaosKreator:
The problem is that depending on your resin depends on what type of material the moulds can be made from. Latex or silicone are your best bet because you need them to be flexible so you can pop the gems out, but some resins won't set in latex or silicone. If you let me know what sort of thing you were thinking of actually casting in I could find out what actually works for that.


I've checked and it's Crystal resin.


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02 Mar 2011 - 18:2351490
Quote j_mercuryuk:
I've checked and it's Crystal resin.


If it's the GEDEO crystal resin that most art/craft shops sell I've used it with silicone cake/soap moulds as well as GEDEO's own 'siligum' and they've all worked perfectly.


02 Mar 2011 - 19:1651494
Yeah, but I have a few different shapes/sizes I want to make and I can't really afford to spend £45-60 to make three moulds. Then £15-20 for the resin. I'd rather aviod spending so much on the moulds if possible.


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03 Mar 2011 - 14:4851543
Why so much for the moulds? You can get silicone pretty cheaply from Tomps:

http://www.tomps.com/shop/addition-cure-rtv-silicone-rubber-05kg-p-5.html


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03 Mar 2011 - 19:1551560
It's this, so I think it's the easy to do conviniance:
http://www.amazon.co.uk/Gedeo-Siligum-Silcone-Moulding-Paste/dp/B0027IZOIQ/ref=pd_sim_k_h_b_cs_1
Though you can find the smaller one cheap, the bigger one I haven't found under £20.


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03 Mar 2011 - 19:5251563
I would go with a proper moulding resin, not that stuff. There's too much room for error during the mixing and relies on your pressing it correctly. Also the cost.

The silicone I've linked to is the sort of stuff you'd use in the video sands has linked. The more you buy the cheaper it gets.


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08 Jun 2011 - 14:0259116
Bringing up an old thread
I'm thinking about casting the brooch and the apple on the headpiece for this since I can't find anything exactly the same and I'm picky when it comes to same-ness:



I haven't cast gems before and looked around a bit, so far the plan is to:

1. Make gems out of fimo and sand until absolutely perfect
2. Make moulds using latex
3. Use resin with resin dye (?)
4. Add chrome backing
5. Profit?

Would this work and where is the best place to get the resin and dye (I only need a small amount)? Should I use polyester or epoxy resin or something else?



Last edited by Pez (08 Jun 2011 - 14:21)
08 Jun 2011 - 15:0559119
I find Siligum http://www.therange.co.uk/invt/392765/?source=132_4 works well for making molds, but I've never worked with latex so I'm bias.

As for dye...I tend to prefer getting glass paints as then the whole batch doesn't have to be the same colour and you can use left over resin to make small shapes for potential later use. But if you're only using the resin for this project, rather than as an investment then maybe the dye would be better.


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08 Jun 2011 - 15:2059123
I'm only thinking of using latex because I have huge amounts of it at home. XD Apparently it doesn't work well with some resins though (mostly polyester ones, gotta read around a bit more. This is so confusing.)


08 Jun 2011 - 16:4659132
Here's a good tray mould for the broach:

http://cgi.ebay.co.uk/Diamonds-Ice-Cube-Tray-Jelly-Soap-Mold-Mould-Silicone-/150530504434?pt=UK_Home_Garden_Food_Drink_Wine_Bar_Accessories&hash=item230c5136f2

I'd recommend using silicone for the moulds. Try Tomps value RTV, I'm casting something in it later this week and got it recommended by a friend.

For the resin I recommend this stuff:

http://cgi.ebay.co.uk/CRYSTAL-RESIN-GEDEO-CLEAR-RESIN-300ML-/250799517604?pt=UK_Crafts_Other_Crafts_EH&hash=item3a64d0efa4

This stuff is THE SHIT. No smell, 24 hour cast, can paint on the back. Has a slight shrink which means the top of the gem where you poured will be slightly concave, but it's not particularly significant. It's a shame I can't figure out where to buy it in bulk.


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08 Jun 2011 - 16:5459133
Quote KhaosKreator:
Here's a good tray mould for the broach:

http://cgi.ebay.co.uk/Diamonds-Ice-Cube-Tray-Jelly-Soap-Mold-Mould-Silicone-/150530504434?pt=UK_Home_Garden_Food_Drink_Wine_Bar_Accessories&hash=item230c5136f2

I'd recommend using silicone for the moulds. Try Tomps value RTV, I'm casting something in it later this week and got it recommended by a friend.

For the resin I recommend this stuff:

http://cgi.ebay.co.uk/CRYSTAL-RESIN-GEDEO-CLEAR-RESIN-300ML-/250799517604?pt=UK_Crafts_Other_Crafts_EH&hash=item3a64d0efa4

This stuff is THE SHIT. No smell, 24 hour cast, can paint on the back. Has a slight shrink which means the top of the gem where you poured will be slightly concave, but it's not particularly significant. It's a shame I can't figure out where to buy it in bulk.


You, sir, are a lifesaver. I poked at ice cube trays for a bit but didn't see that one!

I think I've seen that resin at my local art shop, shall go have a poke! Would you know where I can get some turqoise colouring for resins?

ETA: you've probably seen this before but I just found that resin in 750ml quantitiy: http://www.metalclay.co.uk/products/Crystal-Resin-750ml.html



Last edited by Pez (08 Jun 2011 - 16:58)
08 Jun 2011 - 17:2259135
I recommend the Gedeo crystal resin too, you can always use glass paint instead of the colouring.


08 Jun 2011 - 17:4059136
Totally Gedeo all the way! No fumes, no death, it's so easy. It was the ultimate discovery when I was stuck in a small flat with no outdoor workspace

If you decide to try glass paint with it, you'll need to do testers. I found a green that always went cloudy no matter how little I used, yet the same brands red went crystal clear. I now use resin dyes to save time and resin as they always work and the tiny pot lasts forever.


08 Jun 2011 - 17:4859137
Thanks guys, I'm sold!

Amy-Lou, where do you get your resin dye? I want to make sure I get a brand that'll work with this resin...


08 Jun 2011 - 17:5159138
the opti-clear resins are pretty amazing. i've never used them personally, but people on the forums i watch rave about it, and the results i've seen have been wow. there's a nice range of different gel times too between the three types, 12 mins being the fastest, right up to 40 mins for the slowest.

something worth bearing in mind about clear resin, it's VERY difficult to achieve a 100% optical clearness without the use of pressure casting apparatus. you're always likely to get bubbles and clouding. so never feel you're making a mistake if you get a result like that.


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08 Jun 2011 - 17:5659139
Quote Pez:
Amy-Lou, where do you get your resin dye? I want to make sure I get a brand that'll work with this resin...


I bought it from the 4D Model Shop in Aldgate East, London.
I think it's this one but they don't have photos (and the price has gone up sadly):
http://www.modelshop.co.uk/product/Pigment_translucent_red_25g_CR10007

I'll take a photo for you when I get home so you can see if anyone else does it cheaper. The good thing about it is you only need a drop to colour a whole batch, so that little pot will really last forever. I bought a red, blue and yellow and don't think I'll have to buy another again XD

Edit: It's these little pots:


The label says Trylon - Translucent Colour Paste, 25g for clear casting resin.



Last edited by Amy-Lou (08 Jun 2011 - 23:18)
09 Jun 2011 - 07:5959189
Quote xaerael:
the opti-clear resins are pretty amazing. i've never used them personally, but people on the forums i watch rave about it, and the results i've seen have been wow. there's a nice range of different gel times too between the three types, 12 mins being the fastest, right up to 40 mins for the slowest.

something worth bearing in mind about clear resin, it's VERY difficult to achieve a 100% optical clearness without the use of pressure casting apparatus. you're always likely to get bubbles and clouding. so never feel you're making a mistake if you get a result like that.


*googles* Opti-clear seems to be out of my price range. The results do look real good though!

Thanks - I'll keep that in mind.

Quote Amy-Lou:
Quote Pez:
Amy-Lou, where do you get your resin dye? I want to make sure I get a brand that'll work with this resin...


I bought it from the 4D Model Shop in Aldgate East, London.
I think it's this one but they don't have photos (and the price has gone up sadly):
http://www.modelshop.co.uk/product/Pigment_translucent_red_25g_CR10007

I'll take a photo for you when I get home so you can see if anyone else does it cheaper. The good thing about it is you only need a drop to colour a whole batch, so that little pot will really last forever. I bought a red, blue and yellow and don't think I'll have to buy another again XD

Edit: It's these little pots:


The label says Trylon - Translucent Colour Paste, 25g for clear casting resin.


Thanks so much, now I know what to look for! 4D seem to have it listed on their website too which is awesome.

Gonna start working on this after the weekend, can't wait! Thanks for all your help.


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