Abstract: Foils is adapted to be marked readily by having a water-soluble, water-based or other surface coating (22) applied thereto. The adapted surface (22) permits ink to mark the foil. Such foil may be used for manufacturing balloons (10) or wrapping materials. A method of manufacturing such a foil comprises the step of spraying onto the surface or otherwise adapting the surface (22) of the foil with a readily markable substance, such as a water-soluble coating, to permit printing of chosen designs (24) onto the foil. A method of imprinting a foil with a design (24) comprises the step of feeding a package (36) containing foil through a printer, the printer being arranged for printing the design (24) onto an adapted surface of the foil exposed by the package (36).