How does the lid prop work?

Ceramic pieces release gases and water vapor during firing. Venting allows these gases to escape. Paragon’s fall-away Prop-R-Vent is installed on the switch box of most top-loading kilns. The prop supports the lid in an open position during the venting period. The Prop-R-Vent vents the lid in two stages. To close the lid after venting, lift the lid handle an inch to let the Prop-R-Vent fall. Lower the lid gently; the warranty does not cover damage to the kiln or the ware due to a dropped lid. For lusters and overglazes, engage the Prop-R-Vent in its second position for additional venting. Do not rush the cooling of your kiln with the Prop-R-Vent. This can damage your ware.