mid-15c., from drip (v.). The slang meaning stupid, feeble, or dull person is first recorded 1932, perhaps from earlier American English slang sense nonsense (1919).
Time at heat and temperature are critical in the hardening transformation phase. Rapid cooling and tempering complete the process. Quench and Temper provides strength and uniformity of hardness through the entire part from the surface to the core. This is achieved by heating the entire part up above the transformation temperature for a set period of time. Upon quenching, parts must be tempered to the desired hardness creating a Tempered Martensitic Microstructure. Medium Carbon Steels (.25-.70C) are commonly Quench and Tempered. During this quenching process, parts are cooled rapidly thereby locking in the microstructure transformation. Oil is a very common quench medium for this process.
30C Potency. The designation 30C refers to the amount of dilution used to prepare a homeopathic remedy. To create Arnica 30C, one part Arnica tincture is added to 99 parts of distilled water. This is called a 1C dilution. After homeopathic processing, one part of this mixture is added to 99 parts of distilled water.