Above: Uncapping with an electric hot knife on an uncapping tub by Ben pcc
Today’s beekeeping vocabulary word is, “Uncapping Knife.”
The first step in the extraction process is to break or remove all of the cappings. This may be accomplished using an automated uncapper machine or with a manually-operated uncapping knife. Usually, these tools are used together, along with a pronged cappings fork. To facilitate cutting off these wax cappings, the knife is often heated. The removed bits of wax, called cappings, are rich in honey which can be slowly drained off with the help of some heating. This ‘cappings wax’ is very valuable and often used to make candles or other products. Automated uncapping machines normally work by abrading the surface of the wax with moving chains or bristles or hot knives. This, while messy, makes the process easier than doing this task manually.
Source and to read more: Wikipedia