Alginate molds are as accurate as molds made from other impression materials commonly used in paleontology. When the correct procedures for mixing and taking the impression are followed, alginate provides an inexpensive and quick means of obtaining accurate casts, for example, when visiting other institutions or when specimens being examined are unavailable for loan. We have standardized a cost-effective, time-efficient procedure using alginate in the production of casts for paleontology. Alginate is especially accurate in reproducing dentitions, but has been used in the casting of other skeletal structures.