The core of a golf ball is typically polybutadiene (PB) or a blend of synthetic rubbers. A mantle is moulded around the core, creating a perfect sphere and providing a bridge between the rubber core and plastic cover. Softer balls may have more layers. The cover is moulded over the top with the characteristically dimpled texture. It is typically either polyurethane resin (PUR) or Surlyn ionomer. The graphics are pad (tampo) printed onto the cover and sealed with a high-gloss coating.