Questions tagged [casting]

For questions about casting of liquid metals, plastics, resins, etc. into a mold or desired shape.

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4 votes
3 answers
613 views

Cheapest casting material for a single use of wet-forming leather?

Suppose that we have a mold, made of whatever material that we are happy with. This mold is usually used to be filled by some casting material. Many casting materials exist. Usually, this material ...
0 votes
0 answers
30 views

What precautions need to be observed to create a food-safe silicone mold?

I want to get into silicone casting, in particular to be able to make food-safe items out of (platinum-cure, obviously!) silicone. For various reasons (including simplicity/ease), I expect to be using ...
3 votes
1 answer
58 views

How to color food-safe silicone?

I'm looking to get into silicone casting, and eventually I'm going to want to produce food safe products in custom colors. (Food containers, utensils... teething toys. Stuff that needs to be safe for ...
1 vote
0 answers
37 views

Looking for advice on making an electric furnace that can handle 10kg/22lb of aluminium [closed]

Can anyone recommend a method/tutorial for building an electric furnace that has the capacity to handle around 10kg/22lb of aluminium?
2 votes
1 answer
66 views

High temp castable refractory cement ok for molten silver?

Ive got a tub of Imperial brand Castable Refractory Cement and I'm wondering if it's able to withstand molten silver? Perhaps in casting jewelry or as a crusible. The online product details are as ...
3 votes
1 answer
59 views

Making a Custom-Shape Pillow for Back Sleeping

I hope that this question is not too far off-topic for this stack, but I was hoping to make a custom shaped pillow for back-sleeping that is molded to the shape of my head. I aiming for something that ...
10 votes
3 answers
2k views

Replicating a silicone object

There are lots of articles and how-to guides on the web showing how to replicate a plastic, wood, or metal object by making a silicone mold and using a hard acrylic or epoxy resin to create the object....
5 votes
2 answers
100 views

Some guidelines to create a silicone mold of this flower pot object

I have a 3D printer in which I can print the attached object for use as a planter. I am assuming that the easiest molding process would be to use a silicone mold. As a first timer for creating a mold, ...
2 votes
1 answer
69 views

How to open a black rubber mold in preparation for channel cutting?

We learned to make jewelry from fine pewter from a book titled Principles of Centrifugal Rubber Mold Casting. But the book wasn't clear on how to open the rubber mold after vulcanization in ...
1 vote
1 answer
64 views

Can you cast candle wax in a HDPE Mold safely?

I'm looking into cheap materials I can cast candles into, and I'm wondering if recycled HDPE plastic would be a safe mold to cast candles in.
2 votes
1 answer
116 views

Is water resistant PVA (type 3) a good option for sealing indoor kitchen concrete countertop with a sink?

I am planning to cast an indoor kitchen countertop out of concrete including a concrete sink. Something like this: (the hole is for a small cooktop) I am planning to use glass fibre mesh for strength,...
3 votes
1 answer
59 views

Is there an equivalent to Gelcoat for casting plaster?

I have experience casting fibreglass canoes. When I cast a canoe I first coat the inside of the mold with Gelcoat for a smooth, fibre-free exterior. I am planning on casting some little plaster/resin ...
2 votes
1 answer
107 views

Casting foam inlay for briefcases

I would like to create a foam holder for my stuff to be placed in a briefcase kind of like this The shaped of the object is fairly complex with lots of curves, and simply cutting a straight through ...
3 votes
2 answers
243 views

Can you use a standard ceramic kiln to melt bronze for casting?

I'm starting a home foundry, based in the UK to make small metal casts in aluminium and bronze - practicing with aluminium and moving on to bronze once I've got the skills and equipment set up right. ...
5 votes
1 answer
716 views

Can I use a hair dryer to remove bubbles from casting resin?

Instructions on resin casting with silicone moulds frequently say to use a long necked lighter on the surface of two part epoxy casting resin to remove bubbles. If I am in an environment where naked ...
4 votes
1 answer
76 views

Fracture filling a citrine gemstone

Long story short, the gem was dropped on a stone tile floor and cracked pretty badly. The gem was cracked on the inside before but now a few of those cracks run to the surface and a little chip can ...
5 votes
1 answer
137 views

Will two-part epoxy casting resin melt Lego?

I want to create a custom two-part epoxy resin sculpture of a robot, with Lego Technic inside as a skeleton. Will the resin get so hot it will melt the plastic?
2 votes
1 answer
48 views

Can two-part epoxy casting resin be diluted?

I want to make several resin casts using a featureless spherical silicon mold. The mold only has a diameter of 6 cm (think paperweight or billiard ball with a tabletop miniature sealed inside), but I'...
2 votes
2 answers
47 views

Is there a good low toxicity / food safety clear casting material?

I need to cast some plastic resin into the wood, such as to make a cutting board, where the resin is minimally toxic. (For the moment, let's ignore the toxicity of the wood itself.) I have used the &...
2 votes
2 answers
318 views

What materials can I use to make a cast for melting lead?

What materials can I use to make a cast for melting lead? And how would I make the cast?
4 votes
1 answer
168 views

How to open a hot furnace without damaging it?

I have a heat treatment furnace which is very similar to furnaces used to make jewelry, such as to melt gold, silver and other precious metal alloys for casting into jewelry. In fact, the manufacturer'...
1 vote
1 answer
129 views

How best to thin Silicone for Roto Casting

I've been trying to cast a silicone part using a mold I've 3'd printed. I've built a roto caster to rotate the mold so that it is hollow. I'm using a 2 part Ecoflex silicone. Unfortunately the ...
2 votes
2 answers
212 views

Easy shaping material to use as blank/base/reference for silicone casting/molding

First of all forgive me for not using the correct term for this. I know there is a proper name for the very first mold that is used to create casting jackets, but I cannot remember what it is. ...
5 votes
1 answer
447 views

Will 20 psi get out air bubbles when resin casting? [closed]

I’ve been trying to figure out how much psi I need to get air bubbles out of resin when casting. Does anyone have experience with this? Can anyone tell me what amount of pressure will get rid of air ...
3 votes
1 answer
989 views

What else can be used as flux instead of borax for silver casting?

I am new to jewelry. I would like to try casting silver (pure) in so called green sand. In my research I see that it is recommended to use some sort of flux while melting silver. The most popular and ...
6 votes
2 answers
2k views

How to fill gaps in spherical resin molding

I'm planning on casting an object in clear resin using a spherical silicone mold and did a test to see what I'd have to expect. It's came out quite well - better than I thought it would! - but around ...
1 vote
1 answer
70 views

What materials can be lost wax cast easily?

I am looking to cast a ring using lost wax casting. I know that with my current setup I can cast pure silver, but I got to thinking: why silver? Why not, say, glass? So I am wondering what unusual ...
1 vote
1 answer
925 views

Use laser toner for embossing powder?

I'm looking at the potential to use residual laser toner as a replacement for colored embossing powder; they're pretty similar (given the caveat that toner is messy stuff to handle and clean up). I ...
2 votes
1 answer
33 views

Casting Elastomers as Acoustic Insulators

This is my first foray into casting. Forgive the question if its basic. I would like to cast an object to act as a vibration damper. The initial positive would be 3d printed using something like ...
2 votes
3 answers
635 views

How to cast beads using DIY casein plastic?

I'm experimenting with DIY casein-based plastics, using powdered milk. There are lots of references to casein plastic originally being used mostly for buttons & beads, but no actual instructions ...
3 votes
1 answer
74 views

Does boat polyester resin works well for insect/flower encapsulating?

Around here, polyester resin for arts and crafts is usually sold under the name "Crystal Polyester Resin", because of its colorlessness. In automotive-paint/nautical shops there are other polyester ...
5 votes
3 answers
148 views

What is a castable gold-coloured metal that is less expensive than gold?

I have plans for a table with a gold inlay. Problem is, gold is expensive and the inlay is quite large (it's not a 'wire' inlay - I'd be casting a pretty substantial piece and setting it into the ...
2 votes
2 answers
181 views

Material that can be cut / carved and doesn't react with silicone

I'm currently experimenting with making silicone molds for casting. I'm not interested in the commertially available molds and want to make my own. For financial reasons I use the cartridges of ...
7 votes
1 answer
2k views

How do you open Castin’ Craft resin cans?

Ok. I have this can of Castin’ Craft brand polyester resin that is brand new. I unscrewed the top and was confronted with a second metal barrier: I’ve tried: Prying it with a screwdriver. Grabbing ...
4 votes
1 answer
4k views

How to make chewable silicone beads?

I've been searching for an answer for this, and can't seem to find it! I've read a couple other posts about casting silicone, but no answer quite fits what I'm looking to do. I have an autistic child ...
6 votes
2 answers
42 views

Eliminating or mending breakage when working with jeweler's wax

I want to make a detailed pendant out of cast silver as a gift, but when doing detailed work, and the wax starts to get thin, it breaks. Is there a way to minimize breakage when working with this wax?...