Pit firing is the oldest form of firing in the pottery making world. It is the original method for "baking" clay, it dates all the way back to 30,000 years ago.
Soil saggar is what encloses pieces of pottery.
Paper saggar helps prevent wares in the pottery.
All of these techniques are special because they are original ways to create and keep pottery and clay projects. Each of theme protect the projects and make them stronger.