by Hivesguy. Dermatographism (also called dermatographic urticaria, or dermographism), is a skin disorder which is characterized by the skin producing a hypersensitive reaction when scratched, scraped, rubbed, or otherwise traumatized.ermographism pictures and images like the one below show how the skin forms a wheal on its surface after being stroked or rubbed with a rigid object. Notice how the letters and numbers are very distinct, which is where the term âskin writing diseaseâ getâs its name.
The ideal freezer temperature is 0 Fahrenheit (-18 Celsius) for storing food. And -10 Fahrenheit (-23 Celsius) is recommended when freezing food. For every five degrees Fahrenheit above zero, the recommended storage time is cut in half.
Fahrenheit is a thermodynamic temperature scale, where the freezing point of water is 32 degrees Fahrenheit (Â°F) and the boiling point 212Â°F (at standard atmospheric pressure).This puts the boiling and freezing points of water exactly 180 degrees apart.ahrenheit is a thermodynamic temperature scale, where the freezing point of water is 32 degrees Fahrenheit (Â°F) and the boiling point 212Â°F (at standard atmospheric pressure).