Esther Earl. (Redirected from Esther Day) Esther Grace Earl (August 3, 1994 â August 25, 2010) was an American author, internet vlogger, online personality and a Nerdfighter, as well as an activist in the Harry Potter Alliance.
To begin controlled cooling, allow the kiln to cool as fast as it can for the first 300Â° so the controlled portion of the firing is taking place about 300Â° lower than the cut-off temperature.
1 Retort kiln: a type of kiln which can reach temperatures around 1,500 Â°C (2,732 Â°F) for extended periods of time. 2  Typically, these kilns are used in industrial purposes, and feature movable charging cars which make up the bottom and door of the kiln.