Clay liner tiles are relatively inexpensive-about $10 for a typical 24â²-tall unit. But what you save on materials will most likely exceed the cost of installation labor. Clay flue liners are hard to retrofit in an existing chimney, especially if it isnât straight.lay liner tiles are relatively inexpensive-about $10 for a typical 24â²-tall unit. But what you save on materials will most likely exceed the cost of installation labor. Clay flue liners are hard to retrofit in an existing chimney, especially if it isnât straight.
Beaker tongs are best used to hold a hot beaker. Pick up hot glassware without heat protection and your skin will be injured. This is as true in the laboratory as it is in your kitchen. Lab tongs, part of a range of laboratory safety equipment, help you move hot ceramics and glassware safely.
Mix some NaCl and water in the beaker, stirring the solution with the stirring rod to show the dissolving of the salt. Decant some of the solution into the evaporation dish. Place the watch glass on the top of the evaporation dish using the tongs. Remind the students to use tongs or forceps to pick up hot objects.