sentences:  For the production of the higher gsm in this range, some machines are nevertheless provided with some (4-10) drying cylinders after the yankee.In this case one speaks of "wet creping", as the creping of the paper done on the yankee is not made on the fully dried paper and the completement of drying is accomplished after the yankee cylinder.Yankee cylinders are traditionally made of cast iron and have diameters up to 6 m, therefore much higher than conventional drying cylinders.