Claessens Universal Primed Linen Rolls Are The Ideal Choice For Artists Working In Many Mediums! Claessens Linen Rolls provide artists with optimal professional quality in painting surfaces and craftsmanship. Each specific primed linen type passed through its own set of manufacturing steps and quality control, resulting in premium painting surfaces Claessens is renowned for. After receiving the raw linens, quality control carefully inspects the entire surface for weaving faults. Abnormally thick threads are scrupulously removed. Next, two layers of synthetic adhesive are applied. Each layer is dried on the canvas in a warm-air oven.