10

It won't work. You can melt hot glue in a pan, but it tends to turn yellow and eventually brown if it gets too hot. whether the mold survives the pouring depends on the material. The real problem is that hot glue shrinks quite a lot while cooling down. The mold surface is cooler than the hot glue, so it sets at the outside first, while the center stays ...


6

A few comments about the problem as a whole, before I address your specific question... You are attempting to encapsulate something in a clear resin shell. That shell lacks any distinct shape, being comprised of flat planes and soft organic curves. It does not contain any sharply detailed features or surface textures. In short, the shell probably does ...


5

How about making the final project mask directly from papier-mache without all the casting: Cover the skull in clingfilm to protect it; Papier-mache parts of it (if you try to do it in one go you won't be able to take the thing out, naturally); Glue the parts together; Alter it as you desire - cut some bits here, add some bits there, sand it; Paint it, if ...


4

cyanoacrylate itself will not, however many brands of cyanoacrylate have additives which can. Sulfur is your problem. P-silicon and sulfur do not mix. I work primarily with fossils and use completely additive free cyanoacrylate, the downside it has to be used quickly as it has no stabilizers. We don't use much platinum based silicon just becasue even trace ...


4

According to Wikipedia, resin is: In polymer chemistry and materials science, resin is a solid or highly viscous substance of plant or synthetic origin that is typically convertible into polymers. Resins are usually mixtures of organic compounds. This article focuses on naturally-occurring resins. The article references plants which secrete resin ...


4

You can use food grade silicon for casting as well as for making molds. What you need to look for is chocolate casting silicon. They are pretty expensive and there are plenty of manufacturers, but you need to follow the directions very carefully. In Europe I have had good experience with a product called schokomold If you do cast silicon in a silicon mold,...


4

For use with the widest range of metals, a properly prepared ceramic mold is your best bet. It can tolerate high temperatures and capture fine details well. However, these are commonly single-use molds that are broken to remove the cast object. Rather than trying to find a "silver bullet," you're better off targeting your specific needs for each case. If ...


4

Most household pans work fine for melting lead. Make sure they are thick enough, don't have plastic parts, and don't have Teflon or similar coatings (Teflon and lead share their melting points, apparently). It's best to use a metal handle (I've used those aluminum camping pan grippers in the past, which are very practical, but I only melted relatively small ...


4

Sort of, within limits . HDPE and LDPE melt at temperatures that won't damage silicone designed for that temperature (some silicones that are designed for lower temperature ranges can degrade from the heat). However, HDPE and LDPE don't turn into a liquid. They're more like sticky putty or dense taffy. They don't flow nicely into fine detail; you need to ...


3

Injection molding can in fact be done at home. But judging from the OP this method would be far and above beyond the scope of his current knowledge on these types of things. The easiest way to cast plastic parts at home or in your workspace if that’s the case would be with the use of a commercially available product such as SmoothOn. Simple. Sold on ...


3

If you're using a two-part pourable silicone, you can make a mold of the item with a reusable gelatin-glycerin mold material you can make at home. There are a lot of variations on the formula resulting in different characteristics. The material, itself, is also molded into special effects prosthetics instead of using latex rubber. To investigate the ...


3

I agree with #torjek that a separator (mold-release) spray or liquid would make it possible to caste a silicone object with silicone as the mold making material. The benefit of getting good at this technique is that you could then caste replacement silicone earplugs using the mold which you just made out of silicone. If you need more protection for your ...


3

Sounds like you're looking for a mold release agent. Some examples of release agents are: Pam Cooking Spray Olive Oil applied with a spray pump Industrial Mold Release Agents such as McLube All of the above mold release agents are applied in the same manner. Starting with a clean mold, spray on a thin layer of the mold release agent into the mold, covering ...


2

I agree with the basic idea of what fred-dot-u mentioned, but I'd tweak the method a bit. Put your beads on a wire. Cut apart an old coat-hanger with snips and use that. This would give you a sprue through all the beads at once. Make sure the wire is the same length as the Tupperware that you're gonna use. This way your sprue goes all the way ...


2

If your objective is to create a silicone product, take a different viewpoint of your research thus far. Silicone molds work because silicone sticks to almost nothing other than silicone. If you create a mold using silicone as the foundation, pouring food materials inside means you get food materials out, without sticking. For your beads, consider that you ...


2

You can use a silicone to make a mold in this case too. I've done it in the past. You just have to spray the original silicone piece with the separation spray before you pour the silicone into it like you do the first part of a two part mold.


2

Would a two step process work? Make the first mold off of the fiberglass with latex rubber (or another molding rubber that is not anti-fiberglass) then make a plaster positive from that. So now you have the fiberglass form in plaster, use that for the silicone mold.


2

Depending on the material you will be casting in the mold, you may find that you can make use of a product called Hand Moldable Plastic. This product is shipped as small beads which are heated in boiling water per the instructions. I've used a hot air gun, which works faster and increases the chance of burning your fingers. Once the white beads are heated, ...


2

Traditionally cast iron was cast in sand, link to a Wikipedia page about casting in sand. And I have also seen other metals cast in sand, like pewter and silver. And as indicated in the comments on the question, other materials can be used as well. Like plaster, ceramic, and even some kind of rubber for pewter.


2

Casting resins have very different characteristics, like: virtually no shrinkage no flowing once cured hardness stable color crystal clarity some don't put out much heat during cure, so they can be used in thin thermoplastic molds etc. There is a long list of differences, and hot glue basically sucks at those characteristics. If you need the ...


2

People have suggested many kinds of household materials that can be used for casting. If you really want a resin that looks, feels, and acts like plastic, there are a few options. PVA glue (common white glue) will dry to a soft plastic, but with tremendous shrinkage, and it will redissolve if it gets wet, and can turn cloudy from absorbing humidity. The ...


2

I've never used the stuff, but it has a reputation for sticking to everything. Have you tried a release agent? I'll offer some speculation on what should probably work (the first things I would try in your situation). If the shape of the object lends itself, wrap it with oven parchment paper. That's impregnated with silicone, takes high temperatures, and ...


2

Don't use quick-crete mix your own, for one thing you don't want gravel in detailed or smooth are casting, just sand, the finer the better. I have had a lot of success using a mix of sand and marble dust but I was casting giant pacific clam shell replicas so I wanted that very white sparkly surface. Getting it really smooth requires a sealant, concrete by ...


2

Sculpey is not good for this, it is also expensive. first you want a clay that stays soft, a simple bulk oil-based non-hardening clay tends to work. I prefer softness #4 but there is a lot of different preferences depending on the material being molded, I was working with fossils where cleanup came second to preserving an extremely delicate original. If your ...


2

By "cast," think they are trying to say mold. The beginning technology would be silica sand with a binder. Silica is common beige beach or "play" sand; the binder could be water (damp sand), but will have no strength when it dries. I am thinking something like white wood glue diluted with water. Or, look up "how to make a simple sand ...


1

Food safe, moldable materials are rare in general. The closest thing that comes to my mind is a kind or "organic plastic" made from milk, but it looked hard to work with and I don't know how food safe that really is on the long run. Take for example a simple porcelain dish: the porcelain itself is porous and would stain with food residue. It's the glaze ...


1

Depending on what you need to obtain, and also depending on quantity, you might want to think of other materials. Note: some of the ideas below require you to have at least one of the following: special knowledge; special skill; special tools. Alternative materials: some kind of cement; silicone (colored, transparent...) plastic which can be thermally ...


1

Before going farther, there are some plastics that can be safely melted at home with good ventilation as long as you use the right procedure (warm it slowly and don't exceed the temperature needed to melt it), and some plastics that give off toxic fumes when they melt, so you should never try to melt those indoors. Do your research. The question asks about ...


1

Most plastics can;t be cast easily in this way as they don't have a distinct liquid phase and even when 'melted' have very high viscosity. Generally thermo-softening plastics are formed under considerable pressure eg by injection moulding, extrusion of blow-moulding, or are formed from softened sheets as in vacuum forming. If you want to cast plastic parts ...


1

I have molded a lot of bone and silicon and one are a messy combination, you have to completely seal the bone before you use silicon. multiple soakings in butvar or acrylic works OK. it is a nightmare with liquid silicon but with putty based it is not so bad, you just need to watch out for voids in the silicon. making a plaster over-mold will be a good idea ...


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