Rotation moulded low density polyethylene (LDPE) surface. The embossed logo is cut into the surface of the mould and so reproduced directly into the part. The texture is created by shot blasting (steel bead) on the surface of the aluminium tool. The texture is adjusted by changing the size of steel bead and air pressure used in the process. The glossiness (and subsequently the colour saturation) is determined by the flaming process, which is carried out on the moulded part. Each one is processed separately by heating the surface with an exposed flame. It is often a manual process and so open to variation.

Cross-section through a rotation moulded sample that illustrates an inner layer of foam, which is used to provide added stiffness without a significant increase in weight. Both materials are polyethylene (PE) and produced in the same moulding cycle: the natural (off-white) skin is moulded and once formed the yellow foaming material is added to the mould. The colour has been added to the foamed PE to highlight the separate materials.

Low density polyethylene (LDPE) colour sample for rotation moulding powder by Poliplast.

Rotation moulded high density polyethylene (HDPE) lid for a Thermos cooler box. The heavy texture, which is applied to the surface of the mould and reproduced in the plastic, helps to conceal moulding defects, as well as general wear and tear - PE is relatively soft and will scratch easily if bashed about in the back of a car and on the beach.