Heavy plates are generally produced from steel slabs, heating, rolling, and cutting them as required to achieve the desired final size. The thickness of these plates can vary significantly—from 3 mm ...

This story is a component of the feature “Seasons of Preserves: Citrus Marmalade,” which is part of a four-part series on preserving fruit at home called “L.A. in a Jar.” A stalwart of making jam is ...