![]() (Be careful if you add too much water, your mixture will be too thin.) If it is too thick, add a little more water. Ideally, it should be similar to pancake batter. Examine the consistency of the mixture.Knead the bag of plaster of paris and water for 2 to 3 min to mix thoroughly.Pour about 1 cup of water into the Ziploc™ bag of plaster of paris.Take the cast indoors and allow it to harden for 24 hours.Ĭasting of Footwear Impression Using Plaster of Paris.The cast may have soil or grass on it do not remove it at this time. ![]() (1.2 cm) from the impression and gently pry up the cast.
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