The main ones are tufting, micropapillary, cribriform, and flat. From 1930, the mechanization of tufting favored its development. The first is to inject fibres in the sand with a tufting machine. On a basic level, squab cushions were made more stable by using tufting ties. In the early twentieth century, a new manufacturing method called "tufting" revolutionized the carpeting industry. This tufting perennial bunchgrass can grow tall and in diameter. This is a tufting perennial bunchgrass approaching a meter in maximum height. Tufting is, therefore, a technique for flow visualization. Depending on the equipment used, all shapes and forms may potentially be reinforced by tufting.