Overview
The center of the saucer often contains a depression or raised ring sized to fit a matching cup; this was only introduced in the mid 18th century. The saucer is useful for protecting surfaces from possible damage due to the heat of a cup, and to catch overflow, splashes, and drips from the cup, thus protecting both table linen and the user sitting in a free-standing chair who holds both cup and saucer. The saucer also provides a convenient place for a wet spoon, as might be used to stir the drink in the cup in order to mix sweeteners or creamers into tea or coffee. Some people pour the hot tea or coffee from the cup into the saucer; the increasedThermal transport
When placed beneath a cup, saucers have very little direct influence on beverage cooling rate. For hot, water based beverages (e.g. tea or coffee), cooling rate in a cup is typically dominated by evaporation, which occurs across the free surface in contact with the air. Heat transfer through the bottom of the cup is small relative to heat lost through the top of the cup. Further reducing the heat lost through the bottom of the cup has little effect on the cooling rate of the beverage. Placing a saucer on top of a cup, however, inhibits evaporative cooling and is thus an effective way of reducing the cooling rate so that the drink remains warmer for longer. The reduction in heat loss due to evaporation is typically much greater than the increase in heat loss associated with conduction through the saucer (and subsequent radiation or convective transfer to the surrounding air).Historical reference
Gallery
See also
* Coaster, used to protect the surface where the user might place a beverage * Plate, used to serve foodReferences
External links
* {{Authority control Crockery Teaware