Linen (also referred to by the old term linen) is a type of textile made from flax. Both the textile fiber and the final textile are referred to as linen. Linen is not only used to make clothes, but also for larger surfaces such as tablecloths and curtains and canvases. It was and still is widely used as a covering material for book bindings. Linen was also used for aircraft construction. Linen thread is strong. That is why it is traditionally used for bobbin lace. A very thick linen sewing thread is called iron thread because of its strength. In the past, the flax was first dried in the field. To do this, it had to be turned several times. After drying, the flax is peeled (seeded) and exposed to moisture to break down the pectin that holds the fibers together, the so-called dew rotting. In the past, the flax was rooted in rivers, for example in the Leie, or in water troughs, giving the flax fibers a golden glow, so-called water retting.