OCB Papers OCB papers are made from flax fiber, OCB Blue also contain hemp. The Premium Series marked the entrance of OCB among the big producers, Premium is ultra thin with hologram on the booklet - recently arrived the X-Pert, the Slim -FIT and the gold, all very high quality papers. Then there is the collectible Black Thinking, Filters of cellulose or paper, and metal paper boxes with the Premium design. OCB orange is water resistant and suitable for cold and wet climates, the OCB Crystal is transparent and the OCB is the only major brand that has trasparent papers in her catalog.