An eggshell is the outer covering of a hard-shelled egg and of some forms of eggs with soft outer coats. Bird eggshells contain calcium carbonate and dissolve in various acids, including the vinegar used in cooking. While dissolving the calcium carbonate in an egg shell reacts with the acid to form carbon dioxide.

Other articles related to "eggshell, eggshells":

Eggshell - Diversity - Egg Teeth
... Hatching birds, amphibian and egg-laying reptiles have an egg-tooth used to start an exit hole in the hard eggshell. ...
Gastropod Shell - Taphonomic Implications
... Dinosaur Park Formation, fossil hadrosaur eggshell is rare ... Eggshell fragments are present in only two microfossil sites, both of which are predominated by the preserved shells of invertebrate life, including gastropods ... calcium carbonate into the water that raised the water's pH high enough to prevent the eggshell fragments from dissolving before they could be fossilized ...
Dinosaur Egg - Research Techniques - Light Microscopy
... In the 1870s Paul Gervais invented methods of studying modern eggshells to compare them to fossil eggs found in southern France ... The technique involves embedding a piece of eggshell in epoxy resin ... When the resin dries the eggshell is cut to expose its cross-section ...
Dinosaur Egg - Research Techniques - X Rays
... The eggshell will vary from the rock formed out of the infilling sediment ... Sometimes eggshell fragments in hatched eggs have been mistaken for embryo bones ... to cut the egg open or dissolve some of its eggshell away ...
Eggshell (color) - Eggshell in Human Culture
... Interior design The color eggshell is commonly used in interior design when one desires a pale warm neutral off-white color ... However eggshell paint also refers to a type of hard-wearing wall paint with the same matte sheen as an egg's shell, rather than the same color consequently eggshell paint can be any color, not just ... A light blue color is a common for eggshell ...

Famous quotes containing the word eggshell:

    A doll’s hair concealing
    an eggshell skull delicately
    throbbing, within which
    maggots in voluptuous unrest
    jostle and shrug.
    Denise Levertov (b. 1923)

    Think of our little eggshell of a canoe tossing across that great lake, a mere black speck to the eagle soaring above it!
    Henry David Thoreau (1817–1862)