Casting

At Alec Tiranti, as fine casting plaster suppliers, we offer a wide variety of casting products, with just the items you need to carry out both simple plaster casting to more advanced methods using resins and white metals. It’s also possible to add pigment to plasters and resins, or fill them with stone or metal powders during the casting process. This will enable you to see that the colour you choose is evenly distributed throughout your creation. It also allows you to create the illusion of pure metal or stone by using a resin casting with a metal filler.

The basic concept of casting is using a negative mould to create a positive reproduction.  During the casting process, using release agents can help to prevent the casting material from bonding with the mould, and to protect the mould from damage. There are a range of techniques you can use through the casting process. For example, the “slush moulding” method can be applied to plasters and cement-based products for casting both solid or hollow. This involves pouring the casting agent into the mould and repeatedly spinning the mould throughout the curing process, thus distributing the plaster or cement around the mould in thin layers. Similar techniques can also be used with casting resins.

When crafting small objects such as jewellery and decorative items, gravity casting can be used, pouring by hand. However, bigger castings can either be built up in layers through a hollow casting process, or centripetal action can employ mechanical processes. We can provide the C300 Centricast to cast high quality models in low melt white metal alloys such as pewter, which is appropriate when casting large batches of small to medium sized items.

It is recommended to use RTV 101 silicone to obtain the best quality results, ensuring that as the Centricast spins the mould, you can see a clean spread of the molten metal throughout the mould, reducing the risk of flaws and obstructions.

For more information about casting supplies, from waxes to Jesmonite, get in touch with our technical team and we will be pleased to advise you about the variety of casting options available to you, including mouldmaking, casting and product choices.