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.
The ideal refrigerator temperature range is 1Â°-4.5Â°C (34Â°-40Â°F) . Bacterial and mold growth are considerably slowed down at these temperatures, thus retarding food spoilage.Since water freezes at 0Â°C (32Â°F), this prevents fresh foods from freezing, although when the temperature is at the low end of the range, some areas in the refrigerator may be below the freezing point.acterial and mold growth are considerably slowed down at these temperatures, thus retarding food spoilage. Since water freezes at 0Â°C (32Â°F), this prevents fresh foods from freezing, although when the temperature is at the low end of the range, some areas in the refrigerator may be below the freezing point.