Composting mats and methods for producing substrate materials

Abstract

The invention relates to an annealing plate, which is one of a number of plates used in an annealing process for annealing sheet workpieces and is stacked in order to hold the workpiece from both sides. The annealing plate consists of a pair of principal surfaces, at least one of which is in contact with the workpiece, and one or more openings which are open in the principal surfaces and pass through the plate.