Alginate is the right choice for making body molds. It is formulated in different types with varying set times to suit different purposes. Silica free and high strength options are also available.
Alginate is a substance that is derived from seaweed or dried kelp and formulated into a powder form. This is commonly used by dentists to take impressions of the teeth before making customized crowns, veneers, bridges, etc. for the patients. Apart from this, it also finds other applications in the medical field for dressings and wound care. Alginates even work as a food supplement and enjoy popular usage in the food industry.
However, people outside the world of life casting may not be aware that this material is also used to make body molds. Indeed, alginate can be easily mixed with water to form a smooth gel-like paste that will set firmly to work as a mold. It creates an accurate impression while capturing the finest of details to perfection. The material is hypoallergenic and does not harm the skin in any manner (however, doing a small patch test is always advisable). Yet, artists have to keep in mind that alginates are single use molds. They tend to shrink quickly and cannot be used for multiple castings.
The options are…..
Alginate used for life casting is formulated slightly different from the regular dental impression materials. It is available in different types like:
- Regular set – The alginate is mixed with water and applied on the skin. The traditional formula will set within 4 to 5 minutes and can be easily demolded from the body by squeezing or nudging the skin.
- Fast set – A set time of 4 to 5 minutes may seem quick enough in normal circumstances. But not when one is working with babies or small children! They obviously cannot be expected to stay still for more than 2 to 3 minutes and that is where this fast set formula seems like a boon.
- Slow set – At times, a body mold may need an enhanced working window, especially when making big life casts or working on intricate areas like the face. The increased set time allows more space as it sets gradually without any rude surprises.
- Silica free – Normal alginate formulas contain silica which is considered a carcinogen. It can even be harsh on the skin. Silica free variation is gentle and creates a softer set as well. This is again suitable for babies and other special situations.
- High strength – When a firm set is required with amplified tear resistance in the mold, fiber-reinforced alginate emerges as the perfect answer. As the fiber can hold moisture, it not only provides strength but also delays shrinkage of the mold.
EnvironMolds offers all the above options on its website https://www.artmolds.com/. MoldGel Alginate SILFREE is formulated with varying set times to suit different applications. FiberGel E F/X grade alginate is packed with high tear strength while traditional formulae are also available. Choose the right one based on the application.