As the clay body dries further it hardens more and continues to shrink. The tissue hardens and thickens which is known as nephrosclerosis. This layer over time hardens and thickens repeatedly. As the solvent evaporates, the adhesive hardens. As the glue hardens it shrinks, chipping the glass. When fully mature, the pod dries, hardens, and splits open, exposing the seeds. This ultimately hardens and strengthens the metal. The batter is baked in moulds which hardens it. When calcified, soft tissue hardens, making it more prone to fossilization. As it dangles, its exoskeleton hardens and takes shape. Quickly the soft form hardens and becomes grayish brown. As the embryo develops, the cartilage hardens to form bone. Concrete exerts less pressure against the forms as it hardens. It also occurs when Portland cement hardens. The larva immediately hardens and becomes a darker color.