Kashrus Kurrents Summer 2012

Q: I have a number of utensils which need kashering through hagalah (immersion in boiling water). Which materials may and may not be kashered?

A:   A fleishig utensil which comes into contact with hot milchig food or a milchig utensil which comes into contact with hot fleishig food needs to be kashered before further use.  There are a number of methods for kashering, dependent upon the manner of contact between the utensil and the food.  Perhaps the most common form of kashering is hagalah, in which the utensil is immersed in boiling water.

Metal
The Torah tells us that a vessel may be kashered if it is made from one of six metals:  gold, silver, copper, iron, tin or lead.1  There are other metals and alloys which were not in common use at the time of Matan […]