Plaster of Paris?

Question

How do you make homemade plaster of paris?

Answer 1

Take some calcium sulfate (gypsum) and roast it at 212 to 374 degrees Fahrenheit.

Here is loses three quarters of its water of crystallization and becomes the familiar plaster of Paris. You can then mix it with water to a plastic like consistency or that of a heavy cream. When it dries it becomes inert in a solid mass and doesn't react to water.

Water will weaken it but it will not react to water in the same manner.

That's how you can make it at home, but it would be just as well to buy it and a lot less messy.

All the best in your end product.

Answer 2

First, you can make a paste that is diluted white glue and warm water. Basically, you use two parts white glue with one part warm water. Put the glue and water into a plastic bowl. Add more water, while stirring the mixture, until you get a soupy mixture. The final product should be watery yet still have a slight white glue consistency.



Second, you can create a flour paste to use as Plaster of Paris. Use two to three cups of white flour with one cup to two cups of warm water. Mix the flour and water in a plastic bowl until there are no lumps, and the consistency is a smooth paste that’s easy to stir.



It’s recommended that you use the above recipes with strips of newspaper or gauze strips



This is the best I can come up with without actually buying plaster of paris powder.

Why not just buy the mixable powder...?

It is inexpensive and easy.

www.dickblick.com has several to chose from.