Integrated memory circuits, key components in thousands of electronic and computer products, have recently been made using ferroelectric memory transistors, which offer faster write cycles and lower power requirements than over conventional floating-gate transistors. Preferably, brightstock is completely or substantially absent from the composition. A method of making a plastics material piece includes placing a sheet in a part of a mold, moving a peripheral block, closing the mold, and moving the peripheral block to a molding position while keeping the first and second peripheral zones in contact. The at least one processor is used to automatically generate at least one report reflecting a statistical analysis of the first data and the second data.