How are pressed bricks manufactured from clay?

Pressed bricks are manufactured primarily through the dry-press process, which is specifically suited for clays with very low plasticity.1

In this manufacturing method, the clay is mixed with a minimal amount of water and placed into steel molds. High pressure, reaching up to 1,500 pounds per square inch (10,000 kilopascals), is then applied to the material. This process subjects the bricks to significant pressure to ensure they are free from imperfections in both shape and texture before they undergo the burning process.12

Following the forming stage, the bricks proceed through the standard phases of modern brick production, which include drying, firing in a kiln, and cooling. While other methods like the stiff-mud or soft-mud processes are used for different types of brick, the dry-press technique is distinct for its reliance on high mechanical force rather than high water content to achieve the desired unit dimensions.341