Is Gypsum Plaster Same As Plaster Of Paris? Know More

In case you’re wondering whether Plaster of Paris is the same as gypsum plaster, then you’ve arrived at the correct place since we’ll be discussing the major similarities and differences between the two. We’ll be going through every important aspect, so that when you finally complete reading this guide, you’ll have a better idea about them.

The Chemical Composition

According to a professional service provider for GIB fixing in Auckland, there’s a major difference in the chemical composition between Plaster of Paris and gypsum plaster. The chemical name of Plaster of Paris is CaSO4(1/2 H2O), while the chemical name of gypsum plaster is CaSO4(2H2O). Therefore, it can be easily seen that gypsum plaster has more water content in it than Plaster of Paris. 

The Manufacturing Process

In case you’re unaware then you must know that – gypsum is a naturally occurring mineral in the earth’s crust, such as seawater, lake and sedimentary rocks. Alternatively, Plaster of Paris is created by heating gypsum to a high temperature of 120 degrees Celsius for almost an hour. 

The additional heating process is the reason why gypsum plaster has more water molecules in its chemical composition than Plaster of Paris. When water is mixed with Plaster of Paris, it becomes a gypsum paste, which can then be applied to wall surfaces, false ceilings, as a fireproof agent, and so on. 

The Application

Plaster of Paris is used in collaboration with cement plaster, where it’s used to provide a smooth finish to the rough surface of cement plaster. Such application of Plaster of Paris is essential because, without its application, you cannot proceed to paint the cement plastered surface. 

Alternatively, gypsum plaster effectively eliminates the need to use Plaster of Paris (only for interior walls of a building and not exterior walls) because it provides a smooth surface on application. Moreover, it offers a crack-less surface that can be painted only after four days of application (gypsum plaster takes four days for ideal settlement). 

Therefore, it can be easily concluded that since with gypsum plaster you’re saving the cost that you would have spent on cement plaster & Plaster of Paris, gypsum plaster is a better value proposition. Furthermore, the time taken by each process is also significantly different as using gypsum plaster reduces the time taken by almost 75 percent. 

It should be realized that the use of cement plaster along with Plaster of Paris increases the width of the plastered wall or ceilings much more than simply applying gypsum plaster. 

However, at the end of the heyday, you have to decide and we’re only here to suggest to you the best option. We hope you found our guide helpful.

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