BOLOGNA:The Iran war is seeping into the cosmetics supply chain, pushing up the cost of everything from plastic jars and lipstick tubes to transport, and reminding the beauty industry that even a tub of face cream depends on fragile global trade routes. Cost pressures were a recurring theme last week at one of the sector’s largest trade fairs in the northern Italian city of Bologna, as executives watched Iran’s blockade of the vital Strait of Hormuz shipping route approach a fifth week.