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What is Alignate

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Where and How to Buy Alignate

How to Choose an Alginate Art Mold

Alginate is skin-safe to protect your models, easy to use, and economical. A variety of alginate products are available on the market for you to choose from for your next project. Here are a few facts about alginate to help you determine which product is best for you.


You can purchase three types of alginate: standard alginates that utilize clay fillers, silica-free alginates, or fiber gel alginates. Silica-free products are soft and easy on models, making them a great option for babies or small children. They are also marginally more economical, allowing you to cover more model with less material. However, the resulting mold is soft and apt to tear, so these alginates are best for small molds. Standard alginates produce molds that are less likely to tear, but it takes more product to cover the same area. Fiber gel alginates are even stronger. The fibers add strength and hold moisture, which significantly delays shrinkage. Both the standard and the fiber alginates are good choices for creating large molds.

Mixing and Set Time

Alginates that require warmer temperatures take longer to set, but are far more comfortable for your models. The warmer temps also give you more time to work. If you are a beginner, give yourself more time than you think you’ll need. Hands, feet, and babies are good examples of projects that require an alginate with a quick set time. Torsos, heads, and other large items require alginates with longer set times because you need more time to get your model covered adequately.