|Monthly Tech-Tip |
An example of how a dried piece of clay having lower bentonite content (left) absorbs a drop of water faster. After 10 seconds (middle picture) the water is gone while the other is still wet. By 30 seconds (bottom) all traces of water are gone.
Bentonite can make a clay body instantly plastic, only 2-3% can have a big effect. It also suspends slurries so they don't settle out and slows down drying.