Скачать или смотреть Making a 4" Rock using a mold and Ultracal30

In this video I will show you the step by step instructions on how to make a 4" rock using Gypsum Ultracal30 and a 4" rock mold.

You will need:
-a bowl
-spoon
-scale
-Ultracal30
-4" rock mold
-water

Using a scale, measure out 240g of ultracal 30 when using a 4" rock mold. Zero out your scale and then pour in 90-93 grams of cold tap water.
Mix well using your spoon then gently pour it into your mold. Tap the sides of the mold to remove any of the air bubbles.
The mold will get hot as it's curing and this is why it's important to use cold water.
Let it sit for 1.5 hours to harden, you may then remove from the mold and let it dry for 24 hours in a dry area.

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