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.
The hot plate distributes heat over the entire bottom surface of the beaker. The flame of a bunsen burner, however, superheats one point of the beaker, possibly leading to uneven heating and damage to the beaker. If you do use a bunsen burner, use a ring and a wire gauze pad. The pad (and especially its ceramic center) help distribute the flame's heat over the entire beaker bottom. A word about cooling beakers: When you remove a beaker from heat, be careful where you set it.